add datastore v1beta3 snippets

datastore/index.js

@@ -0,0 +1,60 @@
+'use strict';
+
+var gcloud = require('gcloud');
+
+// This mock is used in the documentation snippets.
+var datastore = {
+  insert: function() {}
+};
+
+function Index(projectId) {
+  this.datastore = gcloud.datastore({
+    projectId: projectId
+  });
+}
+
+Index.prototype.testUnindexedPropertyQuery = function(callback) {
+  var datastore = this.datastore;
+
+  // [START unindexed_property_query]
+  var query = datastore.createQuery('Task')
+    .filter('description =', 'A task description.');
+  // [END unindexed_property_query]
+
+  this.datastore.runQuery(query, callback);
+};
+
+Index.prototype.testExplodingProperties = function(callback) {
+  datastore.key = this.datastore.key;
+
+  // [START exploding_properties]
+  var task = {
+    key: datastore.key('Task'),
+    data: {
+      tags: [
+        'fun',
+        'programming',
+        'learn'
+      ],
+      collaborators: [
+        'alice',
+        'bob',
+        'charlie'
+      ],
+      created: new Date()
+    }
+  };
+
+  datastore.insert(task, function(err) {
+    if (!err) {
+      // Task inserted successfully.
+    }
+  });
+  // [END exploding_properties]
+
+  delete datastore.key;
+
+  this.datastore.insert(task, callback);
+};
+
+module.exports = Index;