X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/ee06f37b0f6f6d94cd05a6ffae556660f7c4a2bc..c930e9176a5a85509c5b0230e2bff5c22a591432:/docs/source/ext-db.html
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+
+
+ The source code
+
+
+
+
+
+// Asbtract base class for SqlDB classes
+Ext.data.SqlDB = function(config){
+ Ext.apply(this, config);
+ Ext.data.SqlDB.superclass.constructor.call(this);
+
+ this.addEvents({
+ open : true,
+ close: true
+ });
+};
+
+Ext.extend(Ext.data.SqlDB, Ext.util.Observable, {
+ maxResults: 10000,
+ openState : false,
+
+ // abstract methods
+ open : function(file, cb, scope){
+ },
+
+ close : function(){
+ },
+
+ exec : function(sql, cb, scope){
+ },
+
+ execBy : function(sql, args, cb, scope){
+ },
+
+ query : function(sql, cb, scope){
+ },
+
+ queryBy : function(sql, args, cb, scope){
+ },
+
+ // protected/inherited method
+ isOpen : function(){
+ return this.openState;
+ },
+
+ getTable : function(name, keyName){
+ return new Ext.data.SqlDB.Table(this, name, keyName);
+ },
+
+ createTable : function(o){
+ var tableName = o.name;
+ var keyName = o.key;
+ var fs = o.fields;
+ var cb = o.callback;
+ var scope = o.scope;
+ if(!(fs instanceof Array)){ // Ext fields collection
+ fs = fs.items;
+ }
+ var buf = [];
+ for(var i = 0, len = fs.length; i < len; i++){
+ var f = fs[i], s = f.name;
+ switch(f.type){
+ case "int":
+ case "bool":
+ case "boolean":
+ s += ' INTEGER';
+ break;
+ case "float":
+ s += ' REAL';
+ break;
+ default:
+ s += ' TEXT';
+ }
+ if(f.allowNull === false || f.name == keyName){
+ s += ' NOT NULL';
+ }
+ if(f.name == keyName){
+ s += ' PRIMARY KEY';
+ }
+ if(f.unique === true){
+ s += ' UNIQUE';
+ }
+
+ buf[buf.length] = s;
+ }
+ var sql = ['CREATE TABLE IF NOT EXISTS ', tableName, ' (', buf.join(','), ')'].join('');
+ this.exec(sql, cb, scope);
+ }
+});
+
+
+Ext.data.SqlDB.getInstance = function(db, config){
+ if(window.htmlControl){ // air
+ return new Ext.data.AirDB(config);
+ } else { // gears
+ return new Ext.data.GearsDB(config);
+ }
+};
+
+
+Ext.data.SqlDB.Table = function(conn, name, keyName){
+ this.conn = conn;
+ this.name = name;
+ this.keyName = keyName;
+};
+
+Ext.data.SqlDB.Table.prototype = {
+ update : function(o, cb, scope){
+ var clause = this.keyName + " = :" + this.keyName;
+ this.updateBy(o, clause, {}, cb, scope);
+ },
+
+ updateBy : function(o, clause, args, cb, scope){
+ var sql = "UPDATE " + this.name + " set ";
+ var fs = [], a = [];
+ for(var key in o){
+ if(o.hasOwnProperty(key)){
+ fs[fs.length] = key + ' = ?';
+ a[a.length] = o[key];
+ }
+ }
+ for(var key in args){
+ if(args.hasOwnProperty(key)){
+ a[a.length] = args[key];
+ }
+ }
+ sql = [sql, fs.join(','), ' WHERE ', clause].join('');
+ this.conn.execBy(sql, a, cb, scope);
+ },
+
+ insert : function(o, cb, scope){
+ var sql = "INSERT into " + this.name + " ";
+ var fs = [], vs = [], a = [];
+ for(var key in o){
+ if(o.hasOwnProperty(key)){
+ fs[fs.length] = key;
+ vs[vs.length] = '?';
+ a[a.length] = o[key];
+ }
+ }
+ sql = [sql, '(', fs.join(','), ') VALUES (', vs.join(','), ')'].join('');
+ this.conn.execBy(sql, a, cb, scope);
+ },
+
+ select : function(clause, cb, scope){
+ this.selectBy(clause, null, cb, scope);
+ },
+
+ selectBy : function(clause, args, cb, scope){
+ var sql = "select * from " + this.name;
+ if(clause){
+ sql += ' ' + clause;
+ }
+ args = args || {};
+ this.conn.queryBy(sql, args, cb, scope);
+ },
+
+ remove : function(clause, cb, scope){
+ this.deleteBy(clause, null, cb, scope);
+ },
+
+ removeBy : function(clause, args, cb, scope){
+ var sql = "delete from " + this.name;
+ if(clause){
+ sql += ' where ' + clause;
+ }
+ args = args || {};
+ this.conn.execBy(sql, args, cb, scope);
+ }
+};
+
+Ext.data.SqlDB.Proxy = function(conn, table, keyName, store){
+ Ext.data.SqlDB.Proxy.superclass.constructor.call(this);
+ this.conn = conn;
+ this.table = this.conn.getTable(table, keyName);
+ this.store = store;
+
+ this.store.on('add', this.onAdd, this);
+ this.store.on('update', this.onUpdate, this);
+ this.store.on('remove', this.onRemove, this);
+};
+
+Ext.extend(Ext.data.SqlDB.Proxy, Ext.data.DataProxy, {
+ load : function(params, reader, callback, scope, arg){
+ if(!this.conn.isOpen()){ // assume that the connection is in the process of opening
+ this.conn.on('open', function(){
+ this.load(params, reader, callback, scope, arg);
+ }, this, {single:true});
+ return;
+ };
+ if(this.fireEvent("beforeload", this, params, reader, callback, scope, arg) !== false){
+ var clause = params.where || '';
+ var args = params.args || [];
+ var group = params.groupBy;
+ var sort = params.sort;
+ var dir = params.dir;
+
+ if(group || sort){
+ clause += ' ORDER BY ';
+ if(group && group != sort){
+ clause += group + ' ASC, ';
+ }
+ clause += sort + ' ' + (dir || 'ASC');
+ }
+
+ this.table.selectBy(clause, args,
+ this.onLoad.createDelegate(this, [{callback:callback, scope:scope, arg:arg, reader: reader}], 0));
+ }else{
+ callback.call(scope||this, null, arg, false);
+ }
+ },
+
+ onLoad : function(trans, rs, e, stmt){
+ if(rs === false){
+ this.fireEvent("loadexception", this, null, trans.arg, e);
+ trans.callback.call(trans.scope||window, null, trans.arg, false);
+ return;
+ }
+ var result = trans.reader.readRecords(rs);
+ this.fireEvent("load", this, rs, trans.arg);
+ trans.callback.call(trans.scope||window, result, trans.arg, true);
+ },
+
+ processData : function(o){
+ var fs = this.store.fields;
+ var r = {};
+ for(var key in o){
+ var f = fs.key(key), v = o[key];
+ if(f){
+ if(f.type == 'date'){
+ r[key] = v ? v.format('Y-m-d H:i:s') : '';
+ }else if(f.type == 'boolean'){
+ r[key] = v ? 1 : 0;
+ }else{
+ r[key] = v;
+ }
+ }
+ }
+ return r;
+ },
+
+ onUpdate : function(ds, record){
+ var changes = record.getChanges();
+ var kn = this.table.keyName;
+ this.table.updateBy(this.processData(changes), kn + ' = ?', [record.data[kn]]);
+ record.commit(true);
+ },
+
+ onAdd : function(ds, records, index){
+ for(var i = 0, len = records.length; i < len; i++){
+ this.table.insert(this.processData(records[i].data));
+ }
+ },
+
+ onRemove : function(ds, record, index){
+ var kn = this.table.keyName;
+ this.table.removeBy(kn + ' = ?', [record.data[kn]]);
+ }
+});
+
+
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