Add support for multiple parents. Fixes #33

Author: tfoxy

src/index.js

@@ -54,42 +54,51 @@ class DSHttpAdapter {
     options = options || {}
     options.params = options.params || {}
 
-    let item
-    let parentKey = resourceConfig.parentKey
     let endpoint = options.hasOwnProperty('endpoint') ? options.endpoint : resourceConfig.endpoint
-    let parentField = resourceConfig.parentField
-    let parentDef = resourceConfig.getResource(resourceConfig.parent)
-    let parentId = options.params[parentKey]
-
-    if (parentId === false || !parentKey || !parentDef) {
-      if (parentId === false) {
-        delete options.params[parentKey]
+    let parents = resourceConfig.parents || (resourceConfig.parent ? {
+      [resourceConfig.parent]: {
+        key: resourceConfig.parentKey,
+        field: resourceConfig.parentField
       }
-      return endpoint
-    } else {
-      delete options.params[parentKey]
+    } : {})
+
+    DSUtils.forOwn(parents, function (parent, parentName) {
+      let item
+      let parentKey = parent.key
+      let parentField = parent.field
+      let parentDef = resourceConfig.getResource(parentName)
+      let parentId = options.params[parentKey]
+
+      if (parentId === false || !parentKey || !parentDef) {
+        if (parentId === false) {
+          delete options.params[parentKey]
+        }
+      } else {
+        delete options.params[parentKey]
 
-      if (DSUtils._sn(id)) {
-        item = resourceConfig.get(id)
-      } else if (DSUtils._o(id)) {
-        item = id
-      }
+        if (DSUtils._sn(id)) {
+          item = resourceConfig.get(id)
+        } else if (DSUtils._o(id)) {
+          item = id
+        }
+        console.log('item', item)
 
-      if (item) {
-        parentId = parentId || item[parentKey] || (item[parentField] ? item[parentField][parentDef.idAttribute] : null)
-      }
+        if (item) {
+          parentId = parentId || item[parentKey] || (item[parentField] ? item[parentField][parentDef.idAttribute] : null)
+        }
 
-      if (parentId) {
-        delete options.endpoint
-        let _options = {}
-        DSUtils.forOwn(options, (value, key) => {
-          _options[key] = value
-        })
-        return DSUtils.makePath(this.getEndpoint(parentDef, parentId, DSUtils._(parentDef, _options)), parentId, endpoint)
-      } else {
-        return endpoint
+        if (parentId) {
+          delete options.endpoint
+          let _options = {}
+          DSUtils.forOwn(options, (value, key) => {
+            _options[key] = value
+          })
+          endpoint = DSUtils.makePath(this.getEndpoint(parentDef, parentId, DSUtils._(parentDef, _options)), parentId, endpoint)
+        }
       }
-    }
+    }, this)
+
+    return endpoint
   }
 
   getPath (method, resourceConfig, id, options) {

test/findAll.spec.js

@@ -32,4 +32,62 @@ describe('dsHttpAdapter.findAll(resourceConfig, params, options)', function () {
       assert.equal(queryTransform.callCount, 2, 'queryTransform should have been called');
     });
   });
+
+  it('should use one of many parents', function () {
+    var _this = this;
+
+    var Thing = datastore.defineResource({
+      name: 'thing',
+      endpoint: 'things',
+      relations: {
+        belongsTo: {
+          user: {
+            localKey: 'userId',
+            localField: 'user',
+            parent: true
+          },
+          posts: {
+            localKey: 'postId',
+            localField: 'post',
+            parent: true
+          }
+        }
+      }
+    });
+
+    if (!Thing.parents) {
+      Thing.parents = {
+        user: {
+          key: 'userId',
+          field: 'user'
+        },
+        posts: {
+          key: 'postId',
+          field: 'post'
+        }
+      }
+    }
+
+    setTimeout(function () {
+      assert.equal(1, _this.requests.length);
+      assert.equal(_this.requests[0].url, 'user/1/things');
+      assert.equal(_this.requests[0].method, 'GET');
+      _this.requests[0].respond(200, { 'Content-Type': 'application/json' }, JSON.stringify([{ id: 1 }]));
+    }, 30);
+
+    return dsHttpAdapter.findAll(Thing, { userId: 1 }).then(function (data) {
+      assert.deepEqual(data, [{ id: 1 }], 'user thing should have been found');
+
+      setTimeout(function () {
+        assert.equal(2, _this.requests.length);
+        assert.equal(_this.requests[1].url, 'posts/2/things');
+        assert.equal(_this.requests[1].method, 'GET');
+        _this.requests[1].respond(200, { 'Content-Type': 'application/json' }, JSON.stringify([{ id: 2 }]));
+      }, 30);
+
+      return dsHttpAdapter.findAll(Thing, { postId: 2 });
+    }).then(function(data) {
+      assert.deepEqual(data, [{ id: 2 }], 'post thing should have been found');
+    });
+  });
 });