Class Ext.data.JsonReader
Package: | Ext.data |
Class: | JsonReader |
Extends: | Ext.data.DataReader |
Defined In: | JsonReader.js |
Data reader class to create an Array of Ext.data.Record objects from a JSON response
based on mappings in a provided Ext.data.Record constructor.
The code below lists all configuration options.
var RecordDef = Ext.data.Record.create([
{name: 'name', mapping: 'name'}, // "mapping" property not needed if it's the same as "name"
{name: 'occupation'}, // This field will use "occupation" as the mapping.
]);
var myReader = new Ext.data.JsonReader({
totalProperty: "results", // The property which contains the number of returned records (可选)
root: "rows", // The property which contains an Array of record objects
id: "id" // The property within the record object that provides an ID for the record (可选)
}, RecordDef);
This would consume a JSON file like this:
{ 'results': 2, 'rows': [
{ 'id': 1, 'name': 'Bill', occupation: 'Gardener' },
{ 'id': 2, 'name': 'Ben', occupation: 'Horticulturalist' } ]
}
属性
-
方法
-
事件
-
设置选项
公共属性
|
jsonData : Object |
JsonReader |
After any data loads, the raw JSON data is available for further custom processing. |
公共方法
|
JsonReader(Object meta , Object[]/Ext.data.Record constructor} ) |
JsonReader |
Create a new JsonReader |
|
read(Object response ) : Object |
JsonReader |
This method is only used by a DataProxy which has retrieved data from a remote server. |
|
readRecords(Object o ) : Object |
JsonReader |
Create a data block containing Ext.data.Records from an XML document. |
公共事件
此类没有公共事件。
设置选项
|
id : String |
JsonReader |
Name of the property within a row object that contains a record identifier value. |
|
root : String |
JsonReader |
name of the property which contains the Array of row objects. |
|
successProperty : String |
JsonReader |
Name of the property from which to retrieve the success attribute used by forms. |
|
totalProperty : String |
JsonReader |
Name of the property from which to retrieve the total number of records in the dataset. This is only needed if the wh... |
属性详情
jsonData
public Object jsonData
After any data loads, the raw JSON data is available for further custom processing.
This property is defined by JsonReader.
构造函数
JsonReader
public function JsonReader(Object meta
, Object[]/Ext.data.Record constructor}
)
方法详情
read
public function read(Object response
)
This method is only used by a DataProxy which has retrieved data from a remote server.
This method is defined by JsonReader.
readRecords
public function readRecords(Object o
)
Create a data block containing Ext.data.Records from an XML document.
参数:
o
: ObjectAn object which contains an Array of row objects in the property specified in the config as 'root, and optionally a property, specified in the config as 'totalProperty' which contains the total size of the dataset.
返回:
This method is defined by JsonReader.
设置详情
id
id : String
Name of the property within a row object that contains a record identifier value.
This config option is defined by JsonReader.
root
root : String
name of the property which contains the Array of row objects.
This config option is defined by JsonReader.
successProperty
successProperty : String
Name of the property from which to retrieve the success attribute used by forms.
This config option is defined by JsonReader.
totalProperty
totalProperty : String
Name of the property from which to retrieve the total number of records in the dataset. This is only needed if the whole dataset is not passed in one go, but is being paged from the remote server.
This config option is defined by JsonReader.