add example to Readme

Author: nodkz

README.md

@@ -1,19 +1,93 @@
 graphql-compose-mongoose
 ======================
-This is a plugin for [graphql-compose](https://github.com/nodkz/graphql-compose), which derives a graphql type from mongoose model.
+This is a plugin for [graphql-compose](https://github.com/nodkz/graphql-compose), which derives a bunch of GraphQL types and resolvers from mongoose models.
+
+Example
+=======
+
+```js
+import { Schema } from 'mongoose';
+import mongooseToTypeComposer from 'graphql-compose-mongoose';
+import { GraphQLSchema, GraphQLObjectType } from 'graphql';
+
+// STEP 1: DEFINE MONGOOSE SCHEMA AND MODEL
+const LanguagesSchema = new Schema({
+  language: String,
+  skill: {
+    type: String,
+    enum: [ 'basic', 'fluent', 'native' ],
+  },
+});
+
+const UserSchema = new Schema({
+  name: String, // standard types
+  age: {
+    type: Number,
+    index: true,
+  }
+  languages: {
+    type: [LanguagesSchema], // you may include other schemas (here included as array of embedded documents)
+    default: [],
+  },
+  contacts: { // another mongoose way for providing embedded documents
+    email: String,
+    phones: [String], // array of strings
+  },
+  gender: { // enum field with values
+    type: String,
+    enum: ['male', 'female', 'ladyboy'],
+  },
+});
+const UserModel = mongoose.model('UserModel', UserSchema);
+export default UserModel;
+
+
+
+// STEP 2: CONVERT MONGOOSE MODEL TO GraphQL PIECES
+const typeComposer = mongooseToTypeComposer(UserModel);
+// get list of 12 Resolvers (findById, updateMany and others)
+const resolvers = typeComposer.getResolvers();
+
+// typeComposer from (graphql-compose) provide bunch if useful methods
+// for modifying GraphQL Types (eg. add/remove fields, relate with other types)
+
+
+
+// STEP 3: CREATE CRAZY GraphQL SCHEMA WITH ALL CRUD USER OPERATIONS
+const graphqlSchema = new GraphQLSchema({
+  query: new GraphQLObjectType({
+    name: 'RootQuery',
+    fields: {
+      userById: resolvers.get('findById').getFieldConfig(),
+      userByIds: resolvers.get('findByIds').getFieldConfig(),
+      userOne: resolvers.get('findOne').getFieldConfig(),
+      userMany: resolvers.get('findMany').getFieldConfig(),
+      userTotal: resolvers.get('count').getFieldConfig(),
+    },
+  }),
+  mutation: new GraphQLObjectType({
+    name: 'RootMutation',
+    fields: {
+      userCreate: resolvers.get('createOne').getFieldConfig(),
+      userUpdateById: resolvers.get('updateById').getFieldConfig(),
+      userUpdateOne: resolvers.get('updateOne').getFieldConfig(),
+      userUpdateMany: resolvers.get('updateMany').getFieldConfig(),
+      userRemoveById: resolvers.get('removeById').getFieldConfig(),
+      userRemoveOne: resolvers.get('removeOne').getFieldConfig(),
+      userRemoveMany: resolvers.get('removeMany').getFieldConfig(),
+    },
+  }),
+});
+```
+
+mongooseToTypeComposer options
+==============================
+will be described
+
 
 TODO
 ====
-- [x] convert mongoose models to GraphQLObjectTypes (supports: all primitive types, enums, embedded documents, document arrays, embedded schemas, deep arrays of any type).
-- [x] write resolve methods (findById, findByIds, findOne, findMany, updateOne, updateMany, removeOne, removeMany, count)
-- [ ] realize helper methods for Type construction from [apiProposal]( https://github.com/nodkz/graphql-compose-mongoose/blob/master/src/metaApiProposal.js)
-- [ ] in queries add support for $lt, $gt and other selector's operators
-- [ ] add support GraphQL Connection Type
-
-Contribute
-==========
-I actively welcome pull requests with code and doc fixes. 
-Also if you made great middleware and want share it within this module, please feel free to open PR.
+- [ ] for `filter` arg add support for $lt, $gt and other selector's operators
 
 [CHANGELOG](https://github.com/nodkz/graphql-compose-mongoose/blob/master/CHANGELOG.md)