✨ Create firebase.findOne

firebase/findOne.js

@@ -0,0 +1,51 @@
+/**
+ * MIT License
+ *
+ * Copyright (c) 2017 Joao Paulo Fernandes Ventura
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+
+var _ = require('lodash');
+var find = require('./find');
+
+/**
+ * Add a new row to the table
+ *
+ * @param {String}  connection The datastore name to query on.
+ * @param {String}  collection The table name to create a record into
+ * @param {Object}  query      The new record to be created
+ * @param {Promise}            Unresolved promise if the created record,
+ *                             otherwise an error throw during the operation
+ */
+var FindOne = function FindOne(connection, collection, query) {
+  var head = function head(documents) {
+    return (documents.length > 0) ? _.head(documents) : null;
+  };
+
+  // FIXME: Optimize Firebase query
+  // This approach is querying ALL documents at Firebase and then filtering
+  // then through Waterline criteria.
+  // This solution is GOOD ENOUGH in order to pass on Waterline Adapter tests,
+  // but should not be used on production environment.
+  return find(connection, collection, query).then(head);
+};
+
+module.exports = FindOne;

firebase/index.js

@@ -29,6 +29,7 @@ var Define = require('./define');
 var Destroy = require('./destroy');
 var Drop = require('./drop');
 var Find = require('./find');
+var FindOne = require('./findOne');
 var RegisterApplication = require('./registerApplication');
 var TearDown = require('./tearDown');
 
@@ -39,6 +40,7 @@ module.exports = {
   'destroy': Destroy,
   'drop': Drop,
   'find': Find,
+  'findOne': FindOne,
   'registerApplication': RegisterApplication,
   'tearDown': TearDown
 };