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Schema Directives implementation for graphene
@directive
import graphene
from graphql import (
GraphQLArgument,
GraphQLInt,
GraphQLNonNull,
GraphQLString,
)
from graphene_directives import CustomDirective, DirectiveLocation, build_schema, directive
CacheDirective = CustomDirective(
name="cache",
locations=[DirectiveLocation.FIELD_DEFINITION, DirectiveLocation.OBJECT],
args={
"max_age": GraphQLArgument(
GraphQLNonNull(GraphQLInt),
description="Specifies the maximum age for cache in seconds.",
),
"swr": GraphQLArgument(
GraphQLInt, description="Stale-while-revalidate value in seconds. Optional."
),
"scope": GraphQLArgument(
GraphQLString, description="Scope of the cache. Optional."
),
},
description="Caching directive to control cache behavior of fields or fragments.",
)
@directive(CacheDirective, max_age=200)
class SomeType(graphene.ObjectType):
field_1 = directive(CacheDirective, field=graphene.String(), max_age=300)
field_2 = directive(CacheDirective, field=graphene.String(), max_age=300, swr=2)
field_3 = graphene.String()
class Query(graphene.ObjectType):
some_query = graphene.Field(SomeType)
schema = build_schema(
query=Query, directives=[CacheDirective]
)
directive_decorator
import graphene
from graphql import (
GraphQLArgument,
GraphQLInt,
GraphQLNonNull,
GraphQLString,
)
from graphene_directives import CustomDirective, DirectiveLocation, build_schema, directive_decorator
CacheDirective = CustomDirective(
name="cache",
locations=[DirectiveLocation.FIELD_DEFINITION, DirectiveLocation.OBJECT],
args={
"max_age": GraphQLArgument(
GraphQLNonNull(GraphQLInt),
description="Specifies the maximum age for cache in seconds.",
),
"swr": GraphQLArgument(
GraphQLInt, description="Stale-while-revalidate value in seconds. Optional."
),
"scope": GraphQLArgument(
GraphQLString, description="Scope of the cache. Optional."
),
},
description="Caching directive to control cache behavior of fields or fragments.",
)
# This returns a partial of directive function
cache = directive_decorator(target_directive=CacheDirective)
@cache(max_age=200)
class SomeType(graphene.ObjectType):
field_1 = cache(field=graphene.String(), max_age=300)
field_2 = cache(field=graphene.String(), max_age=300, swr=2)
field_3 = graphene.String()
class Query(graphene.ObjectType):
some_query = graphene.Field(SomeType)
schema = build_schema(
query=Query, directives=[CacheDirective]
)
from typing import Any
import graphene
from graphql import (
GraphQLArgument,
GraphQLInt,
GraphQLNonNull,
GraphQLString,
)
from graphene_directives import CustomDirective, DirectiveLocation, Schema, build_schema, directive_decorator
def input_transform(inputs: dict, _schema: Schema) -> dict:
"""
def input_transform (inputs: Any, schema: Schema) -> dict,
"""
if inputs.get("max_age") > 200:
inputs["swr"] = 30
return inputs
def validate_non_field_input(_type: Any, inputs: dict, _schema: Schema) -> bool:
"""
def validator (type_: graphene type, inputs: Any, schema: Schema) -> bool,
if validator returns False, library raises DirectiveCustomValidationError
"""
if inputs.get("max_age") > 2500:
return False
return True
def validate_field_input(
_parent_type: Any, _field_type: Any, inputs: dict, _schema: Schema
) -> bool:
"""
def validator (parent_type_: graphene_type, field_type_: graphene type, inputs: Any, schema: Schema) -> bool,
if validator returns False, library raises DirectiveCustomValidationError
"""
if inputs.get("max_age") > 2500:
return False
return True
CacheDirective = CustomDirective(
name="cache",
locations=[DirectiveLocation.FIELD_DEFINITION, DirectiveLocation.OBJECT],
args={
"max_age": GraphQLArgument(
GraphQLNonNull(GraphQLInt),
description="Specifies the maximum age for cache in seconds.",
),
"swr": GraphQLArgument(
GraphQLInt, description="Stale-while-revalidate value in seconds. Optional."
),
"scope": GraphQLArgument(
GraphQLString, description="Scope of the cache. Optional."
),
},
description="Caching directive to control cache behavior of fields or fragments.",
non_field_validator=validate_non_field_input,
field_validator=validate_field_input,
input_transform=input_transform,
)
# This returns a partial of directive function
cache = directive_decorator(target_directive=CacheDirective)
@cache(max_age=200)
class SomeType(graphene.ObjectType):
field_1 = cache(field=graphene.String(), max_age=300)
field_2 = cache(field=graphene.String(), max_age=300, swr=2)
field_3 = graphene.String()
class Query(graphene.ObjectType):
some_query = graphene.Field(SomeType)
schema = build_schema(
query=Query, directives=[CacheDirective]
)
Refer Code
and Graphql Output
FAQs
Schema Directives implementation for graphene
We found that graphene-directives demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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