3 <title>The source code</title>
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8 <pre class="prettyprint lang-js"><div id="cls-Ext.data.Api"></div>/**
11 * Ext.data.Api is a singleton designed to manage the data API including methods
12 * for validating a developer's DataProxy API. Defines variables for CRUD actions
13 * create, read, update and destroy in addition to a mapping of RESTful HTTP methods
14 * GET, POST, PUT and DELETE to CRUD actions.
17 Ext.data.Api = (function() {
19 // private validActions. validActions is essentially an inverted hash of Ext.data.Api.actions, where value becomes the key.
20 // Some methods in this singleton (e.g.: getActions, getVerb) will loop through actions with the code <code>for (var verb in this.actions)</code>
21 // For efficiency, some methods will first check this hash for a match. Those methods which do acces validActions will cache their result here.
22 // We cannot pre-define this hash since the developer may over-ride the actions at runtime.
23 var validActions = {};
26 <div id="prop-Ext.data.Api-actions"></div>/**
27 * Defined actions corresponding to remote actions:
30 create : 'create', // Text representing the remote-action to create records on server.
31 read : 'read', // Text representing the remote-action to read/load data from server.
32 update : 'update', // Text representing the remote-action to update records on server.
33 destroy : 'destroy' // Text representing the remote-action to destroy records on server.
46 <div id="prop-Ext.data.Api-restActions"></div>/**
47 * Defined {CRUD action}:{HTTP method} pairs to associate HTTP methods with the
48 * corresponding actions for {@link Ext.data.DataProxy#restful RESTful proxies}.
66 <div id="method-Ext.data.Api-isAction"></div>/**
67 * Returns true if supplied action-name is a valid API action defined in <code>{@link #actions}</code> constants
68 * @param {String} action
69 * @param {String[]}(Optional) List of available CRUD actions. Pass in list when executing multiple times for efficiency.
72 isAction : function(action) {
73 return (Ext.data.Api.actions[action]) ? true : false;
76 <div id="method-Ext.data.Api-getVerb"></div>/**
77 * Returns the actual CRUD action KEY "create", "read", "update" or "destroy" from the supplied action-name. This method is used internally and shouldn't generally
78 * need to be used directly. The key/value pair of Ext.data.Api.actions will often be identical but this is not necessarily true. A developer can override this naming
79 * convention if desired. However, the framework internally calls methods based upon the KEY so a way of retreiving the the words "create", "read", "update" and "destroy" is
80 * required. This method will cache discovered KEYS into the private validActions hash.
81 * @param {String} name The runtime name of the action.
82 * @return {String||null} returns the action-key, or verb of the user-action or null if invalid.
85 getVerb : function(name) {
86 if (validActions[name]) {
87 return validActions[name]; // <-- found in cache. return immediately.
89 for (var verb in this.actions) {
90 if (this.actions[verb] === name) {
91 validActions[name] = verb;
95 return (validActions[name] !== undefined) ? validActions[name] : null;
98 <div id="method-Ext.data.Api-isValid"></div>/**
99 * Returns true if the supplied API is valid; that is, check that all keys match defined actions
100 * otherwise returns an array of mistakes.
101 * @return {String[]||true}
103 isValid : function(api){
105 var crud = this.actions; // <-- cache a copy of the actions.
106 for (var action in api) {
107 if (!(action in crud)) {
108 invalid.push(action);
111 return (!invalid.length) ? true : invalid;
114 <div id="method-Ext.data.Api-hasUniqueUrl"></div>/**
115 * Returns true if the supplied verb upon the supplied proxy points to a unique url in that none of the other api-actions
116 * point to the same url. The question is important for deciding whether to insert the "xaction" HTTP parameter within an
117 * Ajax request. This method is used internally and shouldn't generally need to be called directly.
118 * @param {Ext.data.DataProxy} proxy
119 * @param {String} verb
122 hasUniqueUrl : function(proxy, verb) {
123 var url = (proxy.api[verb]) ? proxy.api[verb].url : null;
125 for (var action in proxy.api) {
126 if ((unique = (action === verb) ? true : (proxy.api[action].url != url) ? true : false) === false) {
133 <div id="method-Ext.data.Api-prepare"></div>/**
134 * This method is used internally by <tt>{@link Ext.data.DataProxy DataProxy}</tt> and should not generally need to be used directly.
135 * Each action of a DataProxy api can be initially defined as either a String or an Object. When specified as an object,
136 * one can explicitly define the HTTP method (GET|POST) to use for each CRUD action. This method will prepare the supplied API, setting
137 * each action to the Object form. If your API-actions do not explicitly define the HTTP method, the "method" configuration-parameter will
138 * be used. If the method configuration parameter is not specified, POST will be used.
140 new Ext.data.HttpProxy({
141 method: "POST", // <-- default HTTP method when not specified.
143 create: 'create.php',
146 destroy: 'destroy.php'
150 // Alternatively, one can use the object-form to specify the API
151 new Ext.data.HttpProxy({
153 load: {url: 'read.php', method: 'GET'},
154 create: 'create.php',
155 destroy: 'destroy.php',
161 * @param {Ext.data.DataProxy} proxy
163 prepare : function(proxy) {
165 proxy.api = {}; // <-- No api? create a blank one.
167 for (var verb in this.actions) {
168 var action = this.actions[verb];
169 proxy.api[action] = proxy.api[action] || proxy.url || proxy.directFn;
170 if (typeof(proxy.api[action]) == 'string') {
171 proxy.api[action] = {
172 url: proxy.api[action]
178 <div id="method-Ext.data.Api-restify"></div>/**
179 * Prepares a supplied Proxy to be RESTful. Sets the HTTP method for each api-action to be one of
180 * GET, POST, PUT, DELETE according to the defined {@link #restActions}.
181 * @param {Ext.data.DataProxy} proxy
183 restify : function(proxy) {
184 proxy.restful = true;
185 for (var verb in this.restActions) {
186 proxy.api[this.actions[verb]].method = this.restActions[verb];
188 // TODO: perhaps move this interceptor elsewhere? like into DataProxy, perhaps? Placed here
189 // to satisfy initial 3.0 final release of REST features.
190 proxy.onWrite = proxy.onWrite.createInterceptor(function(action, o, response, rs) {
191 var reader = o.reader;
193 switch (response.status) {
194 case 200: // standard 200 response, send control back to HttpProxy#onWrite
197 case 201: // entity created but no response returned
198 res[reader.meta.successProperty] = true;
200 case 204: // no-content. Create a fake response.
201 res[reader.meta.successProperty] = true;
202 res[reader.meta.root] = null;
208 if (res[reader.meta.successProperty] === true) {
209 this.fireEvent("write", this, action, res[reader.meta.root], res, rs, o.request.arg);
211 this.fireEvent('exception', this, 'remote', action, o, res, rs);
213 o.request.callback.call(o.request.scope, res[reader.meta.root], res, res[reader.meta.successProperty]);
215 return false; // <-- false to prevent intercepted function from running.
221 <div id="cls-Ext.data.Api.Error"></div>/**
222 * @class Ext.data.Api.Error
224 * Error class for Ext.data.Api errors
226 Ext.data.Api.Error = Ext.extend(Ext.Error, {
227 constructor : function(message, arg) {
229 Ext.Error.call(this, message);
233 Ext.apply(Ext.data.Api.Error.prototype, {
235 'action-url-undefined': 'No fallback url defined for this action. When defining a DataProxy api, please be sure to define an url for each CRUD action in Ext.data.Api.actions or define a default url in addition to your api-configuration.',
236 'invalid': 'received an invalid API-configuration. Please ensure your proxy API-configuration contains only the actions defined in Ext.data.Api.actions',
237 'invalid-url': 'Invalid url. Please review your proxy configuration.',
238 'execute': 'Attempted to execute an unknown action. Valid API actions are defined in Ext.data.Api.actions"'