Add support for custom global ID (Issue #1276)

graphene/__init__.py

@@ -38,6 +38,10 @@ from .relay import (
     Connection,
     ConnectionField,
     PageInfo,
+    BaseGlobalIDType,
+    DefaultGlobalIDType,
+    SimpleGlobalIDType,
+    UUIDGlobalIDType,
 )
 from .utils.resolve_only_args import resolve_only_args
 from .utils.module_loading import lazy_import
@@ -85,6 +89,10 @@ __all__ = [
     "lazy_import",
     "Context",
     "ResolveInfo",
+    "BaseGlobalIDType",
+    "DefaultGlobalIDType",
+    "SimpleGlobalIDType",
+    "UUIDGlobalIDType",
     # Deprecated
     "AbstractType",
 ]

graphene/relay/__init__.py

@@ -1,6 +1,7 @@
 from .node import Node, is_node, GlobalID
 from .mutation import ClientIDMutation
 from .connection import Connection, ConnectionField, PageInfo
+from .id_type import BaseGlobalIDType, DefaultGlobalIDType, SimpleGlobalIDType, UUIDGlobalIDType
 
 __all__ = [
     "Node",
@@ -10,4 +11,8 @@ __all__ = [
     "Connection",
     "ConnectionField",
     "PageInfo",
+    "BaseGlobalIDType",
+    "DefaultGlobalIDType",
+    "SimpleGlobalIDType",
+    "UUIDGlobalIDType",
 ]

graphene/relay/id_type.py

@@ -0,0 +1,74 @@
+from graphql_relay import from_global_id, to_global_id
+
+from ..types import ID, UUID
+
+
+class BaseGlobalIDType:
+    """
+    Base class that define the required attributes/method for a type.
+    """
+
+    graphene_type = None
+
+    @classmethod
+    def resolve_global_id(cls, info, global_id):
+        # return _type, _id
+        raise NotImplementedError
+
+    @classmethod
+    def to_global_id(cls, _type, _id):
+        # return _id
+        raise NotImplementedError
+
+
+class DefaultGlobalIDType(BaseGlobalIDType):
+    """
+    Default global ID type: base64 encoded version of "<node type name>: <node id>".
+    """
+
+    graphene_type = ID
+
+    @classmethod
+    def resolve_global_id(cls, info, global_id):
+        return from_global_id(global_id)
+
+    @classmethod
+    def to_global_id(cls, _type, _id):
+        return to_global_id(_type, _id)
+
+
+class SimpleGlobalIDType(BaseGlobalIDType):
+    """
+    Simple global ID type: simply the id of the object.
+    To be used carefully as the user is responsible for ensuring that the IDs are indeed global
+    (otherwise it could cause request caching issues).
+    """
+
+    graphene_type = ID
+
+    @classmethod
+    def resolve_global_id(cls, info, global_id):
+        _type = info.return_type.graphene_type._meta.name
+        return _type, global_id
+
+    @classmethod
+    def to_global_id(cls, _type, _id):
+        return _id
+
+
+class UUIDGlobalIDType(BaseGlobalIDType):
+    """
+    UUID global ID type.
+    By definition UUID are global so they are used as they are.
+    """
+
+    graphene_type = UUID
+
+    @classmethod
+    def resolve_global_id(cls, info, global_id):
+        _type = info.return_type.graphene_type._meta.name
+        return _type, global_id
+
+    @classmethod
+    def to_global_id(cls, _type, _id):
+        return _id

graphene/relay/node.py

@@ -2,11 +2,10 @@ from collections import OrderedDict
 from functools import partial
 from inspect import isclass
 
-from graphql_relay import from_global_id, to_global_id
-
-from ..types import ID, Field, Interface, ObjectType
+from ..types import Field, Interface, ObjectType
 from ..types.interface import InterfaceOptions
 from ..types.utils import get_type
+from .id_type import BaseGlobalIDType, DefaultGlobalIDType
 
 
 def is_node(objecttype):
@@ -27,8 +26,8 @@ def is_node(objecttype):
 
 
 class GlobalID(Field):
-    def __init__(self, node=None, parent_type=None, required=True, *args, **kwargs):
-        super(GlobalID, self).__init__(ID, required=required, *args, **kwargs)
+    def __init__(self, node=None, parent_type=None, required=True, global_id_type=DefaultGlobalIDType, *args, **kwargs):
+        super(GlobalID, self).__init__(global_id_type.graphene_type, required=required, *args, **kwargs)
         self.node = node or Node
         self.parent_type_name = parent_type._meta.name if parent_type else None
 
@@ -52,13 +51,13 @@ class NodeField(Field):
         assert issubclass(node, Node), "NodeField can only operate in Nodes"
         self.node_type = node
         self.field_type = type
+        global_id_type = node._meta.global_id_type
 
         super(NodeField, self).__init__(
-            # If we don's specify a type, the field type will be the node
-            # interface
+            # If we don't specify a type, the field type will be the node interface
             type or node,
             description="The ID of the object",
-            id=ID(required=True),
+            id=global_id_type.graphene_type(required=True),
         )
 
     def get_resolver(self, parent_resolver):
@@ -70,13 +69,20 @@ class AbstractNode(Interface):
         abstract = True
 
     @classmethod
-    def __init_subclass_with_meta__(cls, **options):
+    def __init_subclass_with_meta__(cls, global_id_type=DefaultGlobalIDType, **options):
+        assert issubclass(global_id_type, BaseGlobalIDType), \
+            "Custom ID type need to be implemented as a subclass of BaseGlobalIDType."
         _meta = InterfaceOptions(cls)
+        _meta.global_id_type = global_id_type
         _meta.fields = OrderedDict(
-            id=GlobalID(cls, description="The ID of the object.")
+            id=GlobalID(cls, global_id_type=global_id_type, description="The ID of the object.")
         )
         super(AbstractNode, cls).__init_subclass_with_meta__(_meta=_meta, **options)
 
+    @classmethod
+    def resolve_global_id(cls, info, global_id):
+        return cls._meta.global_id_type.resolve_global_id(info, global_id)
+
 
 class Node(AbstractNode):
     """An object with an ID"""
@@ -92,7 +98,7 @@ class Node(AbstractNode):
     @classmethod
     def get_node_from_global_id(cls, info, global_id, only_type=None):
         try:
-            _type, _id = cls.from_global_id(global_id)
+            _type, _id = cls.resolve_global_id(info, global_id)
             graphene_type = info.schema.get_type(_type).graphene_type
         except Exception:
             return None
@@ -110,10 +116,6 @@ class Node(AbstractNode):
         if get_node:
             return get_node(info, _id)
 
-    @classmethod
-    def from_global_id(cls, global_id):
-        return from_global_id(global_id)
-
     @classmethod
     def to_global_id(cls, type, id):
-        return to_global_id(type, id)
+        return cls._meta.global_id_type.to_global_id(type, id)

graphene/relay/tests/test_custom_global_id.py

@@ -0,0 +1,194 @@
+import re
+from uuid import uuid4
+
+from graphql import graphql
+
+from ..connection import Connection, ConnectionField
+from ..id_type import BaseGlobalIDType, SimpleGlobalIDType, UUIDGlobalIDType
+from ..node import Node
+from ...types import Int, ObjectType, Schema, String
+
+
+class TestUUIDGlobalID:
+    def setup(self):
+        self.user_list = [
+            {"id": uuid4(), "name": "First"},
+            {"id": uuid4(), "name": "Second"},
+            {"id": uuid4(), "name": "Third"},
+            {"id": uuid4(), "name": "Fourth"},
+        ]
+        self.users = {user["id"]: user for user in self.user_list}
+
+        class CustomNode(Node):
+            class Meta:
+                global_id_type = UUIDGlobalIDType
+
+        class User(ObjectType):
+            class Meta:
+                interfaces = [CustomNode]
+
+            name = String()
+
+            @classmethod
+            def get_node(cls, _type, _id):
+                return self.users[_id]
+
+        class RootQuery(ObjectType):
+            user = CustomNode.Field(User)
+
+        self.schema = Schema(query=RootQuery, types=[User])
+
+    def test_str_schema_correct(self):
+        """
+        Check that the schema has the expected and custom node interface and user type and that they both use UUIDs
+        """
+        parsed = re.findall(r"(.+) \{\n\s*([\w\W]*?)\n\}", str(self.schema))
+        types = [t for t, f in parsed]
+        fields = [f for t, f in parsed]
+        custom_node_interface = "interface CustomNode"
+        assert custom_node_interface in types
+        assert "id: UUID!" == fields[types.index(custom_node_interface)]
+        user_type = "type User implements CustomNode"
+        assert user_type in types
+        assert "id: UUID!\n  name: String" == fields[types.index(user_type)]
+
+    def test_get_by_id(self):
+        query = """query userById($id: UUID!) {
+            user(id: $id) {
+                id
+                name
+            }
+        }"""
+        # UUID need to be converted to string for serialization
+        result = graphql(self.schema, query, variable_values={"id": str(self.user_list[0]["id"])})
+        assert not result.errors
+        assert result.data["user"]["id"] == str(self.user_list[0]["id"])
+        assert result.data["user"]["name"] == self.user_list[0]["name"]
+
+
+class TestSimpleGlobalID:
+    def setup(self):
+        self.user_list = [
+            {"id": "my global primary key in clear 1", "name": "First"},
+            {"id": "my global primary key in clear 2", "name": "Second"},
+            {"id": "my global primary key in clear 3", "name": "Third"},
+            {"id": "my global primary key in clear 4", "name": "Fourth"},
+        ]
+        self.users = {user["id"]: user for user in self.user_list}
+
+        class CustomNode(Node):
+            class Meta:
+                global_id_type = SimpleGlobalIDType
+
+        class User(ObjectType):
+            class Meta:
+                interfaces = [CustomNode]
+
+            name = String()
+
+            @classmethod
+            def get_node(cls, _type, _id):
+                return self.users[_id]
+
+        class RootQuery(ObjectType):
+            user = CustomNode.Field(User)
+
+        self.schema = Schema(query=RootQuery, types=[User])
+
+    def test_str_schema_correct(self):
+        """
+        Check that the schema has the expected and custom node interface and user type and that they both use UUIDs
+        """
+        parsed = re.findall(r"(.+) \{\n\s*([\w\W]*?)\n\}", str(self.schema))
+        types = [t for t, f in parsed]
+        fields = [f for t, f in parsed]
+        custom_node_interface = "interface CustomNode"
+        assert custom_node_interface in types
+        assert "id: ID!" == fields[types.index(custom_node_interface)]
+        user_type = "type User implements CustomNode"
+        assert user_type in types
+        assert "id: ID!\n  name: String" == fields[types.index(user_type)]
+
+    def test_get_by_id(self):
+        query = """query {
+            user(id: "my global primary key in clear 3") {
+                id
+                name
+            }
+        }"""
+        result = graphql(self.schema, query)
+        assert not result.errors
+        assert result.data["user"]["id"] == self.user_list[2]["id"]
+        assert result.data["user"]["name"] == self.user_list[2]["name"]
+
+
+class TestCustomGlobalID:
+    def setup(self):
+        self.user_list = [
+            {"id": 1, "name": "First"},
+            {"id": 2, "name": "Second"},
+            {"id": 3, "name": "Third"},
+            {"id": 4, "name": "Fourth"},
+        ]
+        self.users = {user["id"]: user for user in self.user_list}
+
+        class CustomGlobalIDType(BaseGlobalIDType):
+            """
+            Global id that is simply and integer in clear.
+            """
+
+            graphene_type = Int
+
+            @classmethod
+            def resolve_global_id(cls, info, global_id):
+                _type = info.return_type.graphene_type._meta.name
+                return _type, global_id
+
+            @classmethod
+            def to_global_id(cls, _type, _id):
+                return _id
+
+        class CustomNode(Node):
+            class Meta:
+                global_id_type = CustomGlobalIDType
+
+        class User(ObjectType):
+            class Meta:
+                interfaces = [CustomNode]
+
+            name = String()
+
+            @classmethod
+            def get_node(cls, _type, _id):
+                return self.users[_id]
+
+        class RootQuery(ObjectType):
+            user = CustomNode.Field(User)
+
+        self.schema = Schema(query=RootQuery, types=[User])
+
+    def test_str_schema_correct(self):
+        """
+        Check that the schema has the expected and custom node interface and user type and that they both use UUIDs
+        """
+        parsed = re.findall(r"(.+) \{\n\s*([\w\W]*?)\n\}", str(self.schema))
+        types = [t for t, f in parsed]
+        fields = [f for t, f in parsed]
+        custom_node_interface = "interface CustomNode"
+        assert custom_node_interface in types
+        assert "id: Int!" == fields[types.index(custom_node_interface)]
+        user_type = "type User implements CustomNode"
+        assert user_type in types
+        assert "id: Int!\n  name: String" == fields[types.index(user_type)]
+
+    def test_get_by_id(self):
+        query = """query {
+            user(id: 2) {
+                id
+                name
+            }
+        }"""
+        result = graphql(self.schema, query)
+        assert not result.errors
+        assert result.data["user"]["id"] == self.user_list[1]["id"]
+        assert result.data["user"]["name"] == self.user_list[1]["name"]