feat(Resolvers): Move connection and pagination resolvers to optionalDependencies. You may not install this packages if you do not use these resolvers.

Author: nodkz

README.md

@@ -14,9 +14,14 @@ This is a plugin for [graphql-compose](https://github.com/nodkz/graphql-compose)
 Installation
 ============
 ```
-npm install graphql graphql-compose graphql-compose-connection graphql-compose-pagination mongoose graphql-compose-mongoose --save
+npm install graphql graphql-compose mongoose graphql-compose-mongoose --save
+```
+Modules `graphql`, `graphql-compose`, `mongoose` are in `peerDependencies`, so should be installed explicitly in your app. They have global objects and should not have ability to be installed as submodule.
+
+If you want to add additional resolvers [`connection`](https://github.com/nodkz/graphql-compose-connection) and/or [`pagination`](https://github.com/nodkz/graphql-compose-pagination) - just install following packages and `graphql-compose-mongoose` will add them automatically.
+```
+npm install graphql-compose-connection graphql-compose-pagination --save
 ```
-Modules `graphql`, `graphql-compose`, `graphql-compose-connection`, `graphql-compose-pagination`, `mongoose` are in `peerDependencies`, so should be installed explicitly in your app. They have global objects and should not have ability to be installed as submodule.
 
 Example
 =======

package.json

@@ -26,10 +26,12 @@
     "babel-runtime": "^6.23.0",
     "object-path": "^0.11.4"
   },
+  "optionalDependencies": {
+    "graphql-compose-connection": ">=2.2.1",
+    "graphql-compose-pagination": ">=1.0.0"
+  },
   "peerDependencies": {
     "graphql-compose": ">=1.20.3 || >=2.0.0",
-    "graphql-compose-connection": ">=2.2.1",
-    "graphql-compose-pagination": ">=1.0.0",
     "mongoose": ">=4.0.0"
   },
   "devDependencies": {
@@ -50,8 +52,8 @@
     "flow-bin": "^0.52.0",
     "graphql": "^0.10.3",
     "graphql-compose": "^2.0.0",
-    "graphql-compose-connection": "^2.2.2",
-    "graphql-compose-pagination": "^1.0.0",
+    "graphql-compose-connection": ">=2.2.1",
+    "graphql-compose-pagination": ">=1.0.0",
     "jest": "^20.0.4",
     "mongodb-memory-server": "^1.3.4",
     "mongoose": "^4.10.7",

src/composeWithMongoose.js

@@ -1,9 +1,7 @@
 /* @flow */
-/* eslint-disable no-use-before-define, no-param-reassign */
+/* eslint-disable no-use-before-define, no-param-reassign, global-require */
 
 import { TypeComposer, InputTypeComposer } from 'graphql-compose';
-import composeWithConnection from 'graphql-compose-connection';
-import composeWithPagination from 'graphql-compose-pagination';
 import { convertModelToGraphQL } from './fieldsConverter';
 import * as resolvers from './resolvers';
 import { getUniqueIndexes, extendByReversedIndexes } from './utils/getIndexesFromModel';
@@ -14,6 +12,7 @@ import type {
   TypeConverterResolversOpts,
   TypeConverterInputTypeOpts,
   ConnectionSortMapOpts,
+  PaginationOpts,
 } from './definition';
 
 export function composeWithMongoose(
@@ -125,20 +124,36 @@ export function createResolvers(
   }
 
   if (!{}.hasOwnProperty.call(opts, 'pagination') || opts.pagination !== false) {
-    const pOpts = opts.pagination || {};
-    composeWithPagination(typeComposer, {
-      findResolverName: 'findMany',
-      countResolverName: 'count',
-      ...pOpts,
-    });
+    preparePaginationResolver(typeComposer, opts.pagination || {});
   }
 }
 
+export function preparePaginationResolver(typeComposer: TypeComposer, opts: PaginationOpts) {
+  try {
+    require.resolve('graphql-compose-pagination');
+  } catch (e) {
+    return;
+  }
+  const composeWithPagination = require('graphql-compose-pagination').default;
+  composeWithPagination(typeComposer, {
+    findResolverName: 'findMany',
+    countResolverName: 'count',
+    ...opts,
+  });
+}
+
 export function prepareConnectionResolver(
   model: MongooseModelT,
   typeComposer: TypeComposer,
   opts: ConnectionSortMapOpts
 ) {
+  try {
+    require.resolve('graphql-compose-connection');
+  } catch (e) {
+    return;
+  }
+  const composeWithConnection = require('graphql-compose-connection').default;
+
   const uniqueIndexes = extendByReversedIndexes(getUniqueIndexes(model), {
     reversedFirst: true,
   });

src/definition.js

@@ -186,7 +186,11 @@ export type TypeConverterResolversOpts = {
     filter?: FilterHelperArgsOpts | false,
   },
   connection?: ConnectionSortMapOpts | false,
-  pagination?: { perPage?: number } | false,
+  pagination?: PaginationOpts | false,
+};
+
+export type PaginationOpts = {
+  perPage?: number
 };
 
 export type FilterHelperArgsOpts = {

yarn.lock

@@ -1898,13 +1898,13 @@ graceful-fs@^4.1.10, graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.4
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
 
-graphql-compose-connection@^2.2.2:
+graphql-compose-connection@>=2.2.1:
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/graphql-compose-connection/-/graphql-compose-connection-2.2.2.tgz#16bc70feade9a127c672ef96fd7a4974bcd0559a"
   dependencies:
     babel-runtime "^6.23.0"
 
-graphql-compose-pagination@^1.0.0:
+graphql-compose-pagination@>=1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/graphql-compose-pagination/-/graphql-compose-pagination-1.0.0.tgz#ae880d7ca2f22dc8337ac1b98f1628d17f944d3f"
   dependencies: