connection: allow nodeType to any named type with or without non-null (#331)

Author: IvanGoncharov

src/connection/__tests__/connection-test.js

@@ -2,6 +2,7 @@ import { expect } from 'chai';
 import { describe, it } from 'mocha';
 import {
   GraphQLInt,
+  GraphQLNonNull,
   GraphQLObjectType,
   GraphQLSchema,
   GraphQLString,
@@ -54,7 +55,7 @@ const userType = new GraphQLObjectType({
 
 const { connectionType: friendConnection } = connectionDefinitions({
   name: 'Friend',
-  nodeType: userType,
+  nodeType: new GraphQLNonNull(userType),
   resolveNode: (edge) => allUsers[edge.node],
   edgeFields: () => ({
     friendshipTime: {
@@ -71,7 +72,7 @@ const { connectionType: friendConnection } = connectionDefinitions({
 });
 
 const { connectionType: userConnection } = connectionDefinitions({
-  nodeType: userType,
+  nodeType: new GraphQLNonNull(userType),
   resolveNode: (edge) => allUsers[edge.node],
 });
 
@@ -246,7 +247,7 @@ describe('connectionDefinition()', () => {
       """An edge in a connection."""
       type FriendEdge {
         """The item at the end of the edge"""
-        node: User
+        node: User!
 
         """A cursor for use in pagination"""
         cursor: String!
@@ -265,7 +266,7 @@ describe('connectionDefinition()', () => {
       """An edge in a connection."""
       type UserEdge {
         """The item at the end of the edge"""
-        node: User
+        node: User!
 
         """A cursor for use in pagination"""
         cursor: String!

src/connection/connection.d.ts

@@ -1,9 +1,11 @@
 import type {
+  GraphQLNonNull,
+  GraphQLNamedType,
+  GraphQLScalarType,
+  GraphQLObjectType,
   GraphQLFieldConfigArgumentMap,
   GraphQLFieldConfigMap,
   GraphQLFieldResolver,
-  GraphQLObjectType,
-  GraphQLScalarType,
   Thunk,
 } from 'graphql';
 
@@ -58,7 +60,7 @@ export interface ConnectionArguments {
 
 export interface ConnectionConfig {
   name?: string;
-  nodeType: GraphQLObjectType;
+  nodeType: GraphQLNamedType | GraphQLNonNull<GraphQLNamedType>;
   resolveNode?: GraphQLFieldResolver<any, any>;
   resolveCursor?: GraphQLFieldResolver<any, any>;
   edgeFields?: Thunk<GraphQLFieldConfigMap<any, any>>;

src/connection/connection.js

@@ -1,13 +1,15 @@
 import {
-  GraphQLBoolean,
-  GraphQLInt,
-  GraphQLNonNull,
   GraphQLList,
+  GraphQLNonNull,
   GraphQLObjectType,
+  GraphQLInt,
   GraphQLString,
+  GraphQLBoolean,
+  getNamedType,
 } from 'graphql';
 
 import type {
+  GraphQLNamedType,
   GraphQLFieldConfigArgumentMap,
   GraphQLFieldConfigMap,
   GraphQLFieldResolver,
@@ -73,7 +75,7 @@ export type ConnectionArguments = {
 
 type ConnectionConfig = {|
   name?: string,
-  nodeType: GraphQLObjectType,
+  nodeType: GraphQLNamedType | GraphQLNonNull<GraphQLNamedType>,
   resolveNode?: GraphQLFieldResolver<any, any>,
   resolveCursor?: GraphQLFieldResolver<any, any>,
   edgeFields?: Thunk<GraphQLFieldConfigMap<any, any>>,
@@ -100,7 +102,7 @@ export function connectionDefinitions(
   config: ConnectionConfig,
 ): GraphQLConnectionDefinitions {
   const { nodeType } = config;
-  const name = config.name ?? nodeType.name;
+  const name = config.name ?? getNamedType(nodeType).name;
   const edgeFields = config.edgeFields ?? {};
   const connectionFields = config.connectionFields ?? {};
   const resolveNode = config.resolveNode;