* @cfg {String} successProperty Name of the property from which to retrieve the success attribute used by forms.
* @cfg {String} root name of the property which contains the Array of row objects.
* @cfg {String} id Name of the property within a row object that contains a record identifier value.
+ * @cfg {Array} fields Array of field definition objects
* @constructor
* Create a new JsonReader
* @param {Object} meta Metadata configuration options
};
Roo.extend(Roo.data.JsonReader, Roo.data.DataReader, {
+ readerType : 'Json',
+
/**
* @prop {Boolean} metaFromRemote - if the meta data was loaded from the remote source.
* Used by Store query builder to append _requestMeta to params.
*/
this.o = o;
var s = this.meta, Record = this.recordType,
- f = Record ? Record.prototype.fields : null, fi = f.items, fl = f.length;
+ f = Record ? Record.prototype.fields : null, fi = f ? f.items : [], fl = f ? f.length : 0;
// Generate extraction functions for the totalProperty, the root, the id, and for each field
if (!this.ef) {
}
}
var records = [];
- for(var i = 0; i < c; i++){
- var n = root[i];
- var values = {};
- var id = this.getId(n);
- for(var j = 0; j < fl; j++){
- f = fi[j];
- var v = this.ef[j](n);
- if (!f.convert) {
- Roo.log('missing convert for ' + f.name);
- Roo.log(f);
- continue;
- }
- values[f.name] = f.convert((v !== undefined) ? v : f.defaultValue);
- }
- var record = new Record(values, id);
- record.json = n;
- records[i] = record;
- }
- return {
+ for(var i = 0; i < c; i++){
+ var n = root[i];
+ var values = {};
+ var id = this.getId(n);
+ for(var j = 0; j < fl; j++){
+ f = fi[j];
+ var v = this.ef[j](n);
+ if (!f.convert) {
+ Roo.log('missing convert for ' + f.name);
+ Roo.log(f);
+ continue;
+ }
+ values[f.name] = f.convert((v !== undefined) ? v : f.defaultValue);
+ }
+ if (!Record) {
+ return {
+ raw : { errorMsg : "JSON Reader Error: fields or metadata not available to create Record" },
+ success : false,
+ records : [],
+ totalRecords : 0
+ };
+ }
+ var record = new Record(values, id);
+ record.json = n;
+ records[i] = record;
+ }
+ return {
raw : o,
- success : success,
- records : records,
- totalRecords : totalRecords
- };
+ success : success,
+ records : records,
+ totalRecords : totalRecords
+ };
+ },
+ // used when loading children.. @see loadDataFromChildren
+ toLoadData: function(rec)
+ {
+ // expect rec just to be an array.. eg [a,b,c, [...] << cn ]
+ var data = typeof(rec.data.cn) == 'undefined' ? [] : rec.data.cn;
+ return { data : data, total : data.length };
+
}
});
\ No newline at end of file