docs(readme): Add supported types and queries to the README

README.md

@@ -1,30 +1,34 @@
 # graffiti-mongoose
 
-[Mongoose](http://mongoosejs.com) (MongoDB) adapter for [graffiti](https://github.com/RisingStack/graffiti).
+[Mongoose](http://mongoosejs.com) (MongoDB) adapter for the [graffiti](https://github.com/RisingStack/graffiti) [GraphQL](https://github.com/graphql/graphql-js) ORM.
 
 ## Install
 
 ```
 npm install @risingstack/graffiti-mongoose --save
 ```
 
-## Test
+## Example
 
-```
-npm test
-```
+Check out the [/example](https://github.com/RisingStack/graffiti-mongoose/tree/master/example) folder.
 
 ## Usage
 
 ```javascript
+// ES6 imports
 import mongoose from 'mongoose';
 import {graphql} from 'graphql';
 import {getSchema} from '@risingstack/graffit-mongoose';
 
+// usual mongoose stuff
 var UserSchema = new mongoose.Schema({
   name: {
     type: String
   },
+  age: {
+    type: Number,
+    indexed: true
+  },
   friends: [{
     type: mongoose.Schema.Types.ObjectId,
     ref: 'User'
@@ -33,10 +37,11 @@ var UserSchema = new mongoose.Schema({
 
 var User = mongoose.model('User', UserSchema);
 
+// graffiti from here: easy, right?
 var schema = getSchema([User]);
 
 var query = `{
-    users {
+    users(age: 28) {
       name
       friends {
         name
@@ -46,3 +51,42 @@ var query = `{
 
 return yield graphql(schema, query);
 ```
+
+## Supported mongoose types
+
+* Number
+* String
+* Boolean
+* Date
+* [Number]
+* [String]
+* [Boolean]
+* [Date]
+* ObjectId with ref (reference to other document, populate)
+* more types coming soon...
+
+## Supported query types
+
+* query
+  * singular: for example `user`
+  * plural: for example `users`
+
+## Supported query arguments
+
+* indexed fields
+* "_id" on singular type
+* array of "_id" on plural type
+
+Which means, you are able to filter like below, if the age is indexed in your mongoose model:
+
+```
+users(age: 19) {}
+user(_id: "mongoId1") {}
+users(_id: "mongoId", "mongoId2"]) {}
+```
+
+## Test
+
+```
+npm test
+```