You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
2.2 KiB
Python
107 lines
2.2 KiB
Python
from collections import Sequence
|
|
from typing import Any, Dict, Mapping, Union, List
|
|
|
|
from redis_developer.om.model import Expression
|
|
|
|
|
|
class LogicalOperatorForListOfExpressions(Expression):
|
|
operator: str = ""
|
|
|
|
def __init__(self, *expressions: Expression):
|
|
self.expressions = list(expressions)
|
|
|
|
@property
|
|
def query(self) -> Mapping[str, List[Expression]]:
|
|
if not self.expressions:
|
|
raise AttributeError("At least one expression must be provided")
|
|
# TODO: This needs to return a RediSearch string.
|
|
# Use the values in each expression object to build the string.
|
|
# Determine the type of query based on the field (numeric range,
|
|
# tag field, etc.).
|
|
return {self.operator: self.expressions}
|
|
|
|
|
|
class Or(LogicalOperatorForListOfExpressions):
|
|
"""
|
|
Logical OR query operator
|
|
|
|
Example:
|
|
|
|
```python
|
|
class Product(JsonModel):
|
|
price: float
|
|
category: str
|
|
|
|
Or(Product.price < 10, Product.category == "Sweets")
|
|
```
|
|
|
|
Will return RediSearch query string like:
|
|
|
|
```
|
|
(@price:[-inf 10]) | (@category:{Sweets})
|
|
```
|
|
"""
|
|
|
|
operator = "|"
|
|
|
|
|
|
class And(LogicalOperatorForListOfExpressions):
|
|
"""
|
|
Logical AND query operator
|
|
|
|
Example:
|
|
|
|
```python
|
|
class Product(Document):
|
|
price: float
|
|
category: str
|
|
|
|
And(Product.price < 10, Product.category == "Sweets")
|
|
```
|
|
|
|
Will return a query string like:
|
|
|
|
```
|
|
(@price:[-inf 10]) (@category:{Sweets})
|
|
```
|
|
|
|
Note that in RediSearch, AND is implied with multiple terms.
|
|
"""
|
|
|
|
operator = " "
|
|
|
|
|
|
class Not(LogicalOperatorForListOfExpressions):
|
|
"""
|
|
Logical NOT query operator
|
|
|
|
Example:
|
|
|
|
```python
|
|
class Product(Document):
|
|
price: float
|
|
category: str
|
|
|
|
Not(Product.price<10, Product.category=="Sweets")
|
|
```
|
|
|
|
Will return a query string like:
|
|
|
|
```
|
|
-(@price:[-inf 10]) -(@category:{Sweets})
|
|
```
|
|
"""
|
|
@property
|
|
def query(self):
|
|
return "-(expression1) -(expression2)"
|
|
|
|
|
|
class QueryResolver:
|
|
def __init__(self, *expressions: Expression):
|
|
self.expressions = expressions
|
|
|
|
def resolve(self) -> str:
|
|
"""Resolve expressions to a RediSearch query string."""
|
|
|
|
|