#18 one to many resolver

lib/pouch-graphql/resolver.js

@@ -90,9 +90,26 @@ function resolveByParentId(parent, args, ctx, info, typeName) {
 
 function resolveListOrSingle(parent, args, ctx, info, typeName) {
   // console.dir(`List or single resolver for ${typeName} on schema ${ctx.environment}`);
-
   // Do not resolve via PouchDB. All values exists in parent.
   if(parent && info.fieldName && parent[info.fieldName]) return Promise.resolve(parent[info.fieldName]);
+  if(parent && info.fieldName && parent[info.fieldName+'Ids']) {
+    return PouchDB.createPouchDB(ctx.environment)
+      .bulkGet({ docs: parent[info.fieldName+'Ids'].map(x => ({id: x}))})
+      .then(x => {
+        const results = x.results.reduce((state, x) => {
+          return state.concat(x.docs.map(x => x.ok))
+        }, []);
+
+        results.forEach(x => {
+          x.id = x._id;
+          x.rev = x._rev;
+          delete x._id;
+          delete x._rev;
+        });
+
+        return results;
+      });
+  }
 
   if(args.id) {
     return PouchDB.createPouchDB(ctx.environment)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "graphql-pouch",
-  "version": "1.1.6",
+  "version": "1.1.7",
   "description": "GraphQL-API runtime on top of PouchDB",
   "author": "Mike Bild <[email protected]>",
   "license": "MIT",

test/integration/graphql/fixtures/relations.graphql

@@ -0,0 +1,10 @@
+{
+  allPosts {
+    id
+    title
+    body
+    tags {
+      value
+    }
+  }
+}

test/integration/graphql/fixtures/relations.json

@@ -0,0 +1,42 @@
+{
+  "data": {
+    "allPosts": [
+      {
+        "id": "test1",
+        "body": "body 1",
+        "title": "title 1",
+        "tags": [{
+          "value": "A1"
+        }, {
+          "value": "B1"
+        }]
+      },
+      {
+        "id": "test101",
+        "body": null,
+        "title": "title 1",
+        "tags": []
+      },
+      {
+        "id": "test102",
+        "body": "body 2",
+        "title": "title 2",
+        "tags": []
+      },
+      {
+        "id": "test2",
+        "title": "title 2",
+        "body": "body 2",
+        "tags": [{
+          "value": "A1"
+        }]
+      },
+      {
+        "id": "test4",
+        "body": "body 4",
+        "title": "title 4",
+        "tags": []
+      }
+    ]
+  }
+}

test/integration/graphql/queries.test.js

@@ -15,20 +15,24 @@ const SCHEMA_DEFINITION = `
 type Post {
   id: ID
   rev: String
-  personId: ID
   title: String
   body: String
+  personId: ID
   person: Person
+  tagsIds: [ID]
+  tags: [Tag]
 }
 
 type Comment {
   id: ID
   rev: String
-  personId: ID
-  postId: ID
   title: String
+  personId: ID
   person: Person
+  postId: ID
   post: Post
+  tagsIds: [ID]
+  tags: [Tag]
 }
 
 type Person {
@@ -54,20 +58,23 @@ describe('GraphQL query integration (no-relay)', () => {
       title: 'title 1',
       body: 'body 1',
       personId: 'joe',
+      tagsIds: ['a1', 'b1'],
     };
     const post2 = {
       doctype: 'Post',
       _id: 'test2',
       title: 'title 2',
       body: 'body 2',
       personId: 'joe',
+      tagsIds: ['a1'],
     };
     const post3 = {
       doctype: 'Post',
       _id: 'test3',
       title: 'title 3',
       body: 'body 3',
       personId: 'joe',
+      tagsIds: [],
     };
     const post4 = {
       doctype: 'Post',
@@ -86,6 +93,16 @@ describe('GraphQL query integration (no-relay)', () => {
       _id: 'jay',
       name: 'Jane Doe',
     };
+    const tagA1 = {
+      doctype: 'Tag',
+      _id: 'a1',
+      value: 'A1',
+    };
+    const tagB1 = {
+      doctype: 'Tag',
+      _id: 'b1',
+      value: 'B1',
+    };
 
     return db.bulkDocs([
       post1,
@@ -94,6 +111,8 @@ describe('GraphQL query integration (no-relay)', () => {
       post4,
       personJoe,
       personJay,
+      tagA1,
+      tagB1,
     ]);
   });