Upgrade to ExtJS 3.0.0 - Released 07/06/2009
[extjs.git] / docs / source / Proxy.html
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+<html>\r
+<head>\r
+  <title>The source code</title>\r
+    <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />\r
+    <script type="text/javascript" src="../resources/prettify/prettify.js"></script>\r
+</head>\r
+<body  onload="prettyPrint();">\r
+    <pre class="prettyprint lang-js">Ext.sql.Proxy = function(conn, table, keyName, store, readonly){\r
+    Ext.sql.Proxy.superclass.constructor.call(this);\r
+    this.conn = conn;\r
+    this.table = this.conn.getTable(table, keyName);\r
+    this.store = store;\r
+\r
+       if (readonly !== true) {\r
+               this.store.on('add', this.onAdd, this);\r
+               this.store.on('update', this.onUpdate, this);\r
+               this.store.on('remove', this.onRemove, this);\r
+       }\r
+};\r
+\r
+Ext.sql.Proxy.DATE_FORMAT = 'Y-m-d H:i:s';\r
+\r
+Ext.extend(Ext.sql.Proxy, Ext.data.DataProxy, {\r
+    load : function(params, reader, callback, scope, arg){\r
+       if(!this.conn.isOpen()){ // assume that the connection is in the process of opening\r
+               this.conn.on('open', function(){\r
+                       this.load(params, reader, callback, scope, arg);\r
+               }, this, {single:true});\r
+               return;\r
+       };\r
+       if(this.fireEvent("beforeload", this, params, reader, callback, scope, arg) !== false){\r
+                       var clause = params.where || '';\r
+                       var args = params.args || [];\r
+                       var group = params.groupBy;\r
+                       var sort = params.sort;\r
+                       var dir = params.dir;\r
+\r
+                       if(group || sort){\r
+                               clause += ' ORDER BY ';\r
+                               if(group && group != sort){\r
+                                       clause += group + ' ASC, ';\r
+                               }\r
+                               clause += sort + ' ' + (dir || 'ASC');\r
+                       }\r
+\r
+                       var rs = this.table.selectBy(clause, args);\r
+                       this.onLoad({callback:callback, scope:scope, arg:arg, reader: reader}, rs);\r
+        }else{\r
+            callback.call(scope||this, null, arg, false);\r
+        }\r
+    },\r
+\r
+    onLoad : function(trans, rs, e, stmt){\r
+        if(rs === false){\r
+               this.fireEvent("loadexception", this, null, trans.arg, e);\r
+            trans.callback.call(trans.scope||window, null, trans.arg, false);\r
+            return;\r
+       }\r
+       var result = trans.reader.readRecords(rs);\r
+        this.fireEvent("load", this, rs, trans.arg);\r
+        trans.callback.call(trans.scope||window, result, trans.arg, true);\r
+    },\r
+\r
+    processData : function(o){\r
+       var fs = this.store.fields;\r
+       var r = {};\r
+       for(var key in o){\r
+               var f = fs.key(key), v = o[key];\r
+                       if(f){\r
+                               if(f.type == 'date'){\r
+                                       r[key] = v ? v.format(Ext.sql.Proxy.DATE_FORMAT,10) : '';\r
+                               }else if(f.type == 'boolean'){\r
+                                       r[key] = v ? 1 : 0;\r
+                               }else{\r
+                                       r[key] = v;\r
+                               }\r
+                       }\r
+               }\r
+               return r;\r
+    },\r
+\r
+    onUpdate : function(ds, record){\r
+       var changes = record.getChanges();\r
+       var kn = this.table.keyName;\r
+       this.table.updateBy(this.processData(changes), kn + ' = ?', [record.data[kn]]);\r
+       record.commit(true);\r
+    },\r
+\r
+    onAdd : function(ds, records, index){\r
+       for(var i = 0, len = records.length; i < len; i++){\r
+               this.table.insert(this.processData(records[i].data));\r
+       }\r
+    },\r
+\r
+    onRemove : function(ds, record, index){\r
+               var kn = this.table.keyName;\r
+       this.table.removeBy(kn + ' = ?', [record.data[kn]]);\r
+    }\r
+});</pre>    \r
+</body>\r
+</html>
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