Merge pull request #40 from relay-tools/createFetch

Expose createFetch

README.md

@@ -8,6 +8,7 @@ Use [Relay](http://facebook.github.io/relay/) without a GraphQL server.
 ### Relay Modern
 
 ```js
+import { Environment } from 'react-relay';
 import { Network } from 'relay-local-schema';
 
 import schema from './data/schema';
@@ -33,6 +34,20 @@ const environment = new Environment({
 });
 ```
 
+For more control over the network layer, you can use `createFetch` to create just the fetch function.
+
+```js
+import { Environment, Network } from 'react-relay';
+import { createFetch } from 'relay-local-schema';
+
+import schema from './data/schema';
+
+const environment = new Environment({
+  network: Network.create(createFetch({ schema })),
+  /* ... */
+});
+```
+
 ### Relay Classic
 
 ```js

src/index.js

@@ -1 +1 @@
-export { Network } from './modern';
+export { createFetch, Network } from './modern';

src/modern/Network.js

@@ -1,24 +1,9 @@
-import { graphql } from 'graphql';
-import { Network as NetworkBase } from 'relay-runtime';
+import { Network } from 'relay-runtime';
 
-export default {
-  create({ schema, rootValue, contextValue }) {
-    function fetchQuery(operation, variables) {
-      return graphql(
-        schema,
-        operation.text,
-        rootValue,
-        contextValue,
-        variables,
-      ).then((payload) => {
-        if (payload.errors) {
-          throw new Error(payload.errors);
-        }
-
-        return payload;
-      });
-    }
+import createFetch from './createFetch';
 
-    return NetworkBase.create(fetchQuery);
+export default {
+  create(options) {
+    return Network.create(createFetch(options));
   },
 };

src/modern/createFetch.js

@@ -0,0 +1,19 @@
+import { graphql } from 'graphql';
+
+export default function createFetch({ schema, rootValue, contextValue }) {
+  return function fetchQuery(operation, variables) {
+    return graphql(
+      schema,
+      operation.text,
+      rootValue,
+      contextValue,
+      variables,
+    ).then((payload) => {
+      if (payload.errors) {
+        throw new Error(payload.errors);
+      }
+
+      return payload;
+    });
+  };
+}

src/modern/index.js

@@ -1 +1,2 @@
+export createFetch from './createFetch';
 export Network from './Network';