Generate a seemingly correct schema for JSON models
This commit is contained in:
Andrew Brookins
parent
9a47d1046d
commit
976fdf3ad4
3 changed files with 384 additions and 121 deletions
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@ -1,6 +1,7 @@
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import abc
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import dataclasses
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import decimal
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import logging
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import operator
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import re
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from copy import deepcopy
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@ -22,7 +23,7 @@ from typing import (
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Protocol,
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List,
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Type,
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Pattern
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Pattern, get_origin, get_args
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)
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import uuid
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@ -37,8 +38,8 @@ from pydantic.utils import Representation
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from .encoders import jsonable_encoder
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model_registry = {}
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_T = TypeVar("_T")
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log = logging.getLogger(__name__)
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class TokenEscaper:
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@ -338,7 +339,6 @@ class FindQuery:
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field_type = cls.resolve_field_type(expression.left)
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field_name = expression.left.name
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else:
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import ipdb; ipdb.set_trace()
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raise QueryNotSupportedError(f"A query expression should start with either a field "
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f"or an expression enclosed in parenthesis. See docs: "
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f"TODO")
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@ -831,24 +831,19 @@ class HashModel(RedisModel, abc.ABC):
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return ""
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return val
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@classmethod
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def schema_for_type(cls, name, typ: Type, field_info: FieldInfo):
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if any(issubclass(typ, t) for t in NUMERIC_TYPES):
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return f"{name} NUMERIC"
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elif issubclass(typ, str):
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if getattr(field_info, 'full_text_search', False) is True:
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return f"{name} TAG {name}_fts TEXT"
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else:
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return f"{name} TAG"
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else:
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return f"{name} TAG"
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@classmethod
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def redisearch_schema(cls):
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hash_prefix = cls.make_key(cls._meta.primary_key_pattern.format(pk=""))
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schema_prefix = f"ON HASH PREFIX 1 {hash_prefix} SCHEMA"
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schema_parts = [schema_prefix]
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schema_parts = [schema_prefix] + cls.schema_for_fields()
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return " ".join(schema_parts)
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@classmethod
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def schema_for_fields(cls):
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schema_parts = []
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for name, field in cls.__fields__.items():
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# TODO: Merge this code with schema_for_type()
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_type = field.outer_type_
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if getattr(field.field_info, 'primary_key', None):
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if issubclass(_type, str):
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@ -858,9 +853,49 @@ class HashModel(RedisModel, abc.ABC):
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schema_parts.append(redisearch_field)
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elif getattr(field.field_info, 'index', None) is True:
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schema_parts.append(cls.schema_for_type(name, _type, field.field_info))
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# TODO: Raise error if user embeds a model field or list and makes it
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# sortable. Instead, the embedded model should mark individual fields
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# as sortable.
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if getattr(field.field_info, 'sortable', False) is True:
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schema_parts.append("SORTABLE")
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return " ".join(schema_parts)
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elif get_origin(_type) == list:
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embedded_cls = get_args(_type)
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if not embedded_cls:
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# TODO: Test if this can really happen.
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log.warning("Model %s defined an empty list field: %s", cls, name)
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continue
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embedded_cls = embedded_cls[0]
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schema_parts.append(cls.schema_for_type(name, embedded_cls,
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field.field_info))
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elif issubclass(_type, RedisModel):
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schema_parts.append(cls.schema_for_type(name, _type, field.field_info))
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return schema_parts
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@classmethod
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def schema_for_type(cls, name, typ: Type, field_info: FieldInfo):
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if get_origin(typ) == list:
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embedded_cls = get_args(typ)
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if not embedded_cls:
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# TODO: Test if this can really happen.
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log.warning("Model %s defined an empty list field: %s", cls, name)
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return ""
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embedded_cls = embedded_cls[0]
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return cls.schema_for_type(name, embedded_cls, field_info)
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elif any(issubclass(typ, t) for t in NUMERIC_TYPES):
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return f"{name} NUMERIC"
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elif issubclass(typ, str):
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if getattr(field_info, 'full_text_search', False) is True:
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return f"{name} TAG {name}_fts TEXT"
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else:
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return f"{name} TAG"
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elif issubclass(typ, RedisModel):
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sub_fields = []
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for embedded_name, field in typ.__fields__.items():
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sub_fields.append(cls.schema_for_type(f"{name}_{embedded_name}", field.outer_type_,
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field.field_info))
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return " ".join(sub_fields)
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else:
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return f"{name} TAG"
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class JsonModel(RedisModel, abc.ABC):
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@ -874,3 +909,88 @@ class JsonModel(RedisModel, abc.ABC):
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if not document:
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raise NotFoundError
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return cls.parse_raw(document)
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@classmethod
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def redisearch_schema(cls):
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key_prefix = cls.make_key(cls._meta.primary_key_pattern.format(pk=""))
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schema_prefix = f"ON JSON PREFIX 1 {key_prefix} SCHEMA"
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schema_parts = [schema_prefix] + cls.schema_for_fields()
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return " ".join(schema_parts)
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@classmethod
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def schema_for_fields(cls):
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schema_parts = []
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json_path = "$"
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for name, field in cls.__fields__.items():
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# TODO: Merge this code with schema_for_type()?
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_type = field.outer_type_
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if getattr(field.field_info, 'primary_key', None):
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if issubclass(_type, str):
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redisearch_field = f"{json_path}.{name} AS {name} TAG"
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else:
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redisearch_field = cls.schema_for_type(f"{json_path}.{name}", name, "", _type, field.field_info)
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schema_parts.append(redisearch_field)
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elif getattr(field.field_info, 'index', None) is True:
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schema_parts.append(cls.schema_for_type(f"{json_path}.{name}", name, "", _type, field.field_info))
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# TODO: Raise error if user embeds a model field or list and makes it
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# sortable. Instead, the embedded model should mark individual fields
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# as sortable.
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if getattr(field.field_info, 'sortable', False) is True:
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schema_parts.append("SORTABLE")
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elif get_origin(_type) == list:
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embedded_cls = get_args(_type)
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if not embedded_cls:
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# TODO: Test if this can really happen.
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log.warning("Model %s defined an empty list field: %s", cls, name)
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continue
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embedded_cls = embedded_cls[0]
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schema_parts.append(cls.schema_for_type(f"{json_path}.{name}[]", name, f"{name}",
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embedded_cls, field.field_info))
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elif issubclass(_type, RedisModel):
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schema_parts.append(cls.schema_for_type(f"{json_path}.{name}", name, f"{name}", _type,
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field.field_info))
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return schema_parts
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@classmethod
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# TODO: We need both the "name" of the field (address_line_1) as we'll
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# find it in the JSON document, AND the name of the field as it should
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# be in the redisearch schema (address_address_line_1). Maybe both "name"
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# and "name_prefix"?
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def schema_for_type(cls, json_path: str, name: str, name_prefix: str, typ: Type,
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field_info: FieldInfo) -> str:
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index_field_name = f"{name_prefix}{name}"
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should_index = getattr(field_info, 'index', False)
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if get_origin(typ) == list:
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embedded_cls = get_args(typ)
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if not embedded_cls:
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# TODO: Test if this can really happen.
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log.warning("Model %s defined an empty list field: %s", cls, name)
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return ""
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embedded_cls = embedded_cls[0]
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# TODO: We need to pass the "JSON Path so far" which should include the
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# correct syntax for an array.
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return cls.schema_for_type(f"{json_path}[]", name, f"{name_prefix}{name}", embedded_cls, field_info)
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elif issubclass(typ, RedisModel):
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sub_fields = []
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for embedded_name, field in typ.__fields__.items():
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sub_fields.append(cls.schema_for_type(f"{json_path}.{embedded_name}",
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embedded_name,
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f"{name_prefix}_",
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field.outer_type_,
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field.field_info))
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return " ".join(filter(None, sub_fields))
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elif should_index:
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if any(issubclass(typ, t) for t in NUMERIC_TYPES):
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return f"{json_path} AS {index_field_name} NUMERIC"
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elif issubclass(typ, str):
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if getattr(field_info, 'full_text_search', False) is True:
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return f"{json_path} AS {index_field_name} TAG " \
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f"{json_path} AS {index_field_name}_fts TEXT"
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else:
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return f"{json_path} AS {index_field_name} TAG"
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else:
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return f"{json_path} AS {index_field_name} TAG"
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return ""
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@ -74,7 +74,7 @@ def members():
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def test_validates_required_fields():
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# Raises ValidationError: last_name, address are required
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# Raises ValidationError: last_name is required
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with pytest.raises(ValidationError):
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Member(
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first_name="Andrew",
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@ -2,6 +2,7 @@ import abc
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import decimal
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import datetime
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from typing import Optional, List
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from unittest import mock
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import pytest
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import redis
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@ -11,9 +12,10 @@ from redis_developer.orm import (
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JsonModel,
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Field,
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)
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from redis_developer.orm.model import RedisModelError, QueryNotSupportedError, NotFoundError
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r = redis.Redis()
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today = datetime.datetime.today()
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today = datetime.date.today()
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class BaseJsonModel(JsonModel, abc.ABC):
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@ -25,13 +27,14 @@ class Address(BaseJsonModel):
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address_line_1: str
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address_line_2: Optional[str]
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city: str
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state: str
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country: str
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postal_code: str
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postal_code: str = Field(index=True)
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class Item(BaseJsonModel):
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price: decimal.Decimal
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name: str
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name: str = Field(index=True, full_text_search=True)
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class Order(BaseJsonModel):
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@ -45,6 +48,7 @@ class Member(BaseJsonModel):
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last_name: str
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email: str = Field(index=True)
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join_date: datetime.date
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age: int
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# Creates an embedded model.
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address: Address
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@ -52,169 +56,308 @@ class Member(BaseJsonModel):
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# Creates an embedded list of models.
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orders: Optional[List[Order]]
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class Meta(BaseJsonModel.Meta):
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model_key_prefix = "member" # This is the default
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address = Address(
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@pytest.fixture()
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def address():
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yield Address(
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address_line_1="1 Main St.",
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city="Happy Town",
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state="WY",
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postal_code=11111,
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country="USA"
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)
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def test_validates_required_fields():
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# Raises ValidationError: last_name, address are required
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with pytest.raises(ValidationError):
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Member(
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first_name="Andrew",
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zipcode="97086",
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join_date=today
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city="Portland",
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state="OR",
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country="USA",
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postal_code=11111
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)
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def test_validates_field():
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@pytest.fixture()
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def members(address):
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member1 = Member(
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first_name="Andrew",
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last_name="Brookins",
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email="a@example.com",
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age=38,
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join_date=today,
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address=address
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)
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member2 = Member(
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first_name="Kim",
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last_name="Brookins",
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email="k@example.com",
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age=34,
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join_date=today,
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address=address
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)
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member3 = Member(
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first_name="Andrew",
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last_name="Smith",
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email="as@example.com",
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age=100,
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join_date=today,
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address=address
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)
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member1.save()
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member2.save()
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member3.save()
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yield member1, member2, member3
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def test_validates_required_fields(address):
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# Raises ValidationError address is required
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with pytest.raises(ValidationError):
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Member(
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first_name="Andrew",
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last_name="Brookins",
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zipcode="97086",
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join_date=today,
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)
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def test_validates_field(address):
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# Raises ValidationError: join_date is not a date
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with pytest.raises(ValidationError):
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Member(
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first_name="Andrew",
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last_name="Brookins",
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join_date="yesterday"
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join_date="yesterday",
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address=address
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)
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# Passes validation
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def test_validation_passes():
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def test_validation_passes(address):
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member = Member(
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first_name="Andrew",
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last_name="Brookins",
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email="a@example.com",
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address=address,
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join_date=today
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join_date=today,
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age=38,
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address=address
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)
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assert member.first_name == "Andrew"
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def test_gets_pk():
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new_address = Address(
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address_line_1="1 Main St.",
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city="Happy Town",
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state="WY",
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postal_code=11111,
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country="USA"
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)
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assert new_address.pk is not None
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def test_saves_model():
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# Save a model instance to Redis
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address.save()
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address2 = Address.get(address.pk)
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assert address2 == address
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def test_saves_with_embedded_models():
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def test_saves_model_and_creates_pk(address):
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member = Member(
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first_name="Andrew",
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last_name="Brookins",
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email="a@example.com",
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address=address,
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join_date=datetime.date.today()
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join_date=today,
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age=38,
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address=address
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)
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# Save a model instance to Redis
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member.save()
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member2 = Member.get(member.pk)
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assert member2 == member
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assert member2.address == address
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def test_saves_with_deeply_embedded_models():
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hat = Item(
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name="Cool hat",
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price=2.99
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)
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shoe = Item(
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name="Expensive shoe",
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price=299.99
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)
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order = Order(
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total=302.98,
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items=[hat, shoe],
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created_on=today,
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)
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member = Member(
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first_name="Andrew",
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last_name="Brookins",
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email="a@example.com",
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address=address,
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orders=[order],
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join_date=today
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)
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member.save()
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member2 = Member.get(member.pk)
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assert member2.orders[0] == order
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assert member2.orders[0].items[0] == hat
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# Save many model instances to Redis
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@pytest.mark.skip("Not implemented yet")
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def test_saves_many():
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def test_saves_many(address):
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members = [
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Member(
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first_name="Andrew",
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last_name="Brookins",
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email="a@example.com",
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join_date=today,
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address=address,
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join_date=today
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age=38
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),
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Member(
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first_name="Kim",
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last_name="Brookins",
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email="k@example.com",
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join_date=today,
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address=address,
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join_date=today
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age=34
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)
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]
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Member.add(members)
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@pytest.mark.skip("No implemented yet")
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def test_updates_a_model():
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member = Member(
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first_name="Andrew",
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last_name="Brookins",
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email="a@example.com",
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address=address,
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join_date=today
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)
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# Update a model instance in Redis
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member.first_name = "Brian"
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member.last_name = "Sam-Bodden"
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member.save()
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@pytest.mark.skip("Not ready yet")
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def test_updates_a_model(members):
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member1, member2, member3 = members
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# Or, with an implicit save:
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member.update(first_name="Brian", last_name="Sam-Bodden")
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member1.update(last_name="Smith")
|
||||
assert Member.find(Member.pk == member1.pk).first() == member1
|
||||
|
||||
# Or, affecting multiple model instances with an implicit save:
|
||||
Member.filter(Member.last_name == "Brookins").update(last_name="Sam-Bodden")
|
||||
Member.find(Member.last_name == "Brookins").update(last_name="Smith")
|
||||
results = Member.find(Member.last_name == "Smith")
|
||||
assert sorted(results) == members
|
||||
|
||||
# Or, updating a field in an embedded model:
|
||||
member2.update(address__city="Happy Valley")
|
||||
assert Member.find(Member.pk == member2.pk).first().address.city == "Happy Valley"
|
||||
|
||||
|
||||
@pytest.mark.skip("Not implemented yet")
|
||||
def test_exact_match_queries():
|
||||
# TODO: Should get() support expressions? I.e., ...
|
||||
# What if the field wasn't unique and there were two "a@example.com"
|
||||
# entries? This would raise a MultipleObjectsReturned error:
|
||||
member = Member.get(Member.email == "a.m.brookins@gmail.com")
|
||||
def test_paginate_query(members):
|
||||
member1, member2, member3 = members
|
||||
actual = Member.find().all(batch_size=1)
|
||||
assert sorted(actual) == [member1, member2, member3]
|
||||
|
||||
# What if you know there might be multiple results? Use filter():
|
||||
members = Member.filter(Member.last_name == "Brookins")
|
||||
|
||||
# What if you want to only return values that don't match a query?
|
||||
members = Member.exclude(Member.last_name == "Brookins")
|
||||
def test_access_result_by_index_cached(members):
|
||||
member1, member2, member3 = members
|
||||
query = Member.find().sort_by('age')
|
||||
# Load the cache, throw away the result.
|
||||
assert query._model_cache == []
|
||||
query.execute()
|
||||
assert query._model_cache == [member2, member1, member3]
|
||||
|
||||
# You can combine filer() and exclude():
|
||||
members = Member.filter(Member.last_name == "Brookins").exclude(
|
||||
Member.first_name == "Andrew")
|
||||
# Access an item that should be in the cache.
|
||||
with mock.patch.object(query.model, 'db') as mock_db:
|
||||
assert query[0] == member2
|
||||
assert not mock_db.called
|
||||
|
||||
|
||||
def test_access_result_by_index_not_cached(members):
|
||||
member1, member2, member3 = members
|
||||
query = Member.find().sort_by('age')
|
||||
|
||||
# Assert that we don't have any models in the cache yet -- we
|
||||
# haven't made any requests of Redis.
|
||||
assert query._model_cache == []
|
||||
assert query[0] == member2
|
||||
assert query[1] == member1
|
||||
assert query[2] == member3
|
||||
|
||||
|
||||
def test_exact_match_queries(members):
|
||||
member1, member2, member3 = members
|
||||
|
||||
actual = Member.find(Member.last_name == "Brookins").all()
|
||||
assert sorted(actual) == [member1, member2]
|
||||
|
||||
actual = Member.find(
|
||||
(Member.last_name == "Brookins") & ~(Member.first_name == "Andrew")).all()
|
||||
assert actual == [member2]
|
||||
|
||||
actual = Member.find(~(Member.last_name == "Brookins")).all()
|
||||
assert actual == [member3]
|
||||
|
||||
actual = Member.find(Member.last_name != "Brookins").all()
|
||||
assert actual == [member3]
|
||||
|
||||
actual = Member.find(
|
||||
(Member.last_name == "Brookins") & (Member.first_name == "Andrew")
|
||||
| (Member.first_name == "Kim")
|
||||
).all()
|
||||
assert actual == [member2, member1]
|
||||
|
||||
actual = Member.find(Member.first_name == "Kim", Member.last_name == "Brookins").all()
|
||||
assert actual == [member2]
|
||||
|
||||
actual = Member.find(Member.address.city == "Portland").all()
|
||||
assert actual == [member1, member2, member3]
|
||||
|
||||
|
||||
def test_recursive_query_resolution(members):
|
||||
member1, member2, member3 = members
|
||||
|
||||
actual = Member.find((Member.last_name == "Brookins") | (
|
||||
Member.age == 100
|
||||
) & (Member.last_name == "Smith")).all()
|
||||
assert sorted(actual) == [member1, member2, member3]
|
||||
|
||||
|
||||
def test_tag_queries_boolean_logic(members):
|
||||
member1, member2, member3 = members
|
||||
|
||||
actual = Member.find(
|
||||
(Member.first_name == "Andrew") &
|
||||
(Member.last_name == "Brookins") | (Member.last_name == "Smith")).all()
|
||||
assert sorted(actual) == [member1, member3]
|
||||
|
||||
|
||||
def test_tag_queries_punctuation():
|
||||
member = Member(
|
||||
first_name="Andrew, the Michael", # This string uses the TAG field separator.
|
||||
last_name="St. Brookins-on-Pier",
|
||||
email="a@example.com",
|
||||
age=38,
|
||||
join_date=today
|
||||
)
|
||||
member.save()
|
||||
|
||||
assert Member.find(Member.first_name == "Andrew the Michael").first() == member
|
||||
assert Member.find(Member.last_name == "St. Brookins-on-Pier").first() == member
|
||||
assert Member.find(Member.email == "a@example.com").first() == member
|
||||
|
||||
|
||||
def test_tag_queries_negation(members):
|
||||
member1, member2, member3 = members
|
||||
|
||||
actual = Member.find(
|
||||
~(Member.first_name == "Andrew") &
|
||||
(Member.last_name == "Brookins") | (Member.last_name == "Smith")).all()
|
||||
assert sorted(actual) == [member2, member3]
|
||||
|
||||
actual = Member.find(
|
||||
(Member.first_name == "Andrew") & ~(Member.last_name == "Brookins")).all()
|
||||
assert sorted(actual) == [member3]
|
||||
|
||||
|
||||
def test_numeric_queries(members):
|
||||
member1, member2, member3 = members
|
||||
|
||||
actual = Member.find(Member.age == 34).all()
|
||||
assert actual == [member2]
|
||||
|
||||
actual = Member.find(Member.age > 34).all()
|
||||
assert sorted(actual) == [member1, member3]
|
||||
|
||||
actual = Member.find(Member.age < 35).all()
|
||||
assert actual == [member2]
|
||||
|
||||
actual = Member.find(Member.age <= 34).all()
|
||||
assert actual == [member2]
|
||||
|
||||
actual = Member.find(Member.age >= 100).all()
|
||||
assert actual == [member3]
|
||||
|
||||
actual = Member.find(~(Member.age == 100)).all()
|
||||
assert sorted(actual) == [member1, member2]
|
||||
|
||||
|
||||
def test_sorting(members):
|
||||
member1, member2, member3 = members
|
||||
|
||||
actual = Member.find(Member.age > 34).sort_by('age').all()
|
||||
assert sorted(actual) == [member3, member1]
|
||||
|
||||
actual = Member.find(Member.age > 34).sort_by('-age').all()
|
||||
assert sorted(actual) == [member1, member3]
|
||||
|
||||
with pytest.raises(QueryNotSupportedError):
|
||||
# This field does not exist.
|
||||
Member.find().sort_by('not-a-real-field').all()
|
||||
|
||||
with pytest.raises(QueryNotSupportedError):
|
||||
# This field is not sortable.
|
||||
Member.find().sort_by('join_date').all()
|
||||
|
||||
|
||||
def test_not_found():
|
||||
with pytest.raises(NotFoundError):
|
||||
# This ID does not exist.
|
||||
Member.get(1000)
|
||||
|
||||
|
||||
def test_schema():
|
||||
assert Member.redisearch_schema() == "ON JSON PREFIX 1 " \
|
||||
"redis-developer:tests.test_json_model.Member: " \
|
||||
"SCHEMA $.pk AS pk TAG " \
|
||||
"$.email AS email TAG " \
|
||||
"$.address.pk AS address_pk TAG " \
|
||||
"$.address.postal_code AS address_postal_code TAG " \
|
||||
"$.orders[].pk AS orders_pk TAG " \
|
||||
"$.orders[].items[].pk AS orders_items_pk TAG " \
|
||||
"$.orders[].items[].name AS orders_items_name TAG " \
|
||||
"$.orders[].items[].name AS orders_items_name_fts TEXT"
|
||||
|
|
|
|||
Loading…
Reference in a new issue