Ext.data.field.String alias: data.field.string

allowNull : Boolean

Use when converting received data into a Ext.data.field.Integer, Ext.data.field.Number, Ext.data.field.Boolean or Ext.data.field.String type. If the value cannot be parsed, null will be used if allowNull is true, otherwise a default value for that type will be used:

• for int and float - 0.
• for string - "".
• for bool - false.

Note that when parsing of Ext.data.field.Date type fails, the value will be null regardless of this setting.

Defaults to:

false

calculate : Function

This config defines a simple field calculation function. A calculate method only has access to the record data and should return the value of the calculated field. When provided in this way, the depends config is automatically determined by parsing the calculate function. For example:

 fields: [{
     name: 'firstName',
     type: 'string'
 },{
     name: 'lastName',
     type: 'string'
 },{
     name: 'fullName',
     calculate: function (data) {
         return data.firstName + ' ' + data.lastName;
     }
 }]

The above 'fullName' field is equivalent to:

 {
     name: 'fullName',
     convert: function (v, rec) {
         return rec.get('firstName') + ' ' + rec.get('lastName');
     },
     depends: ['firstName', 'lastName']
 }

The restrictions on form for a calculate method are that the accesses to field values must match the following regular expression (case insensitive):

 data.([a-z_][a-z0-9_]*)
 // where 'data' is the param passed to the calculate method

The only advantage of a calculate method over a convert method is automatic determination of depends.

Note: The use of calculate and method-convert are exclusive. The calculate method will override the convert method if both are configured.

Note: Fields used by the calculate method must be explicitly defined in the fields of the model.

Parameters

Returns

convert : Function

If specified this config overrides the convert method. See also calculate for simple field calculations.

Note: The use of calculate and convert are exclusive. The calculate method will override the convert method if both are configured.

critical : Boolean

A critical field is a field that must always be sent to the server even if it has not changed. The most common example of such a field is the "id" of a record (see Ext.data.Model#idProperty but the Ext.data.Model#versionProperty is similarly a critical field.

Defaults to:

false

defaultValue : Object

The default value used when the creating an instance from a raw data object, and the property referenced by the mapping does not exist in that data object.

The value undefined prevents defaulting in a value.

Defaults to:

undefined

depends : String / String[]

The field name or names within the Ext.data.Model on which the value of this field depends, and from which a new value may be calculated. These values are the values used by the convert method. If you do not have a convert method then this config should not be specified.

Before using this config you should consider if using a calculate method instead of a convert method would be simpler.

Whenever any of the named fields are set using the set method, this fields will have its convert method called passing the Ext.data.Model so that the dependent value can be calculated from all fields which it needs.

For example, to display a person's full name, using two separate firstName and lastName fields, configure the name field like this:

{
    name: 'name',

    // Will be called whenever forename or surname fields are set
    convert: function (v, rec) {
        return rec.get('firstName') + ' ' + rec.get('lastName');
    },

    depends: [ 'firstName', 'lastName' ],

    // It should not be returned to the server - it's not a database field
    persist: false
}

Note that if you do not want the calculated field to be part of the field set sent back to the server when the store is synchronized, you should configure the field with persist set to false.

Defaults to:

null

mapping : String / Number / Function

(Optional) A path expression for use by the Ext.data.reader.Reader implementation that is creating the Ext.data.Model to extract the Field value from the data object. If the path expression is the same as the field name, the mapping may be omitted. A function may be passed to do complex data extraction. The examples below are simple just to demonstrate the capability, typically, a function would not be used to extract such simple data.

The form of the mapping expression depends on the Reader being used.

• Ext.data.reader.Json

  The mapping is a string containing the javascript expression to reference the data from an element of the data item's rootProperty Array. Defaults to the field name. If a function is passed, a single argument is received which contains the raw json object:

  // Server returns [{"name": "Foo", "age": 1}, {"name": "Bar", "age": 2}]
  mapping: function(data) {
      return data.name;
  }
  

• Ext.data.reader.Xml

  The mapping is an Ext.DomQuery path to the data item relative to the DOM element that represents the record. Defaults to the field name. If a function is passed, a single argument is received which contains the record node:

  // Server returns <Root><Person><Name>Foo</Name><Age>1</Age></Person><Person><Name>Bar</Name><Age>2</Age></Person></Root>
  mapping: function(data) {
      return data.firstChild.textContent;
  }
  

• Ext.data.reader.Array

  The mapping is a number indicating the Array index of the field's value. Defaults to the field specification's Array position. If a function is passed, a single argument is received which contains the child array.

  // Server returns [["Foo", 1], ["Bar", 2]]
  mapping: function(data) {
      return data[0];
  }
  

If a more complex value extraction strategy is required, then configure the Field with a cfg-convert function. This is passed the whole row object, and may interrogate it in whatever way is necessary in order to return the desired data.

Defaults to:

null

name : String

The name by which the field is referenced within the Model. This is referenced by, for example, the dataIndex property in column definition objects passed to Ext.grid.property.HeaderContainer.

Note: In the simplest case, if no properties other than name are required, a field definition may consist of just a String for the field name.

Defaults to:

null

persist : Boolean

False to exclude this field from the Ext.data.Model#modified fields in a record. This will also exclude the field from being written using a Ext.data.writer.Writer. This option is useful when fields are used to keep state on the client but do not need to be persisted to the server.

Defaults to false for calculated fields and true otherwise.

Defaults to:

null

reference : String / Object

The name of the entity referenced by this field. In most databases, this relationship is represented by a "foreign key". That is, a value for such a field matches the value of the id for an entity of this type.

For further documentation, see Ext.data.schema.Reference.

Defaults to:

null

serialize : Function

sortType : Function / String

A function which converts a Field's value to a comparable value in order to ensure correct sort ordering.

Predefined functions are provided in Ext.data.SortTypes. A custom sort example:

// current sort     after sort we want
// +-+------+          +-+------+
// |1|First |          |1|First |
// |2|Last  |          |3|Second|
// |3|Second|          |2|Last  |
// +-+------+          +-+------+

sortType: function(value) {
   switch (value.toLowerCase()) // native toLowerCase():
   {
      case 'first': return 1;
      case 'second': return 2;
      default: return 3;
   }
}

May also be set to a String value, corresponding to one of the named sort types in Ext.data.SortTypes.

summary : String / Object / Function

The summary type for this field. This is used to calculate a summary value by the Ext.data.Model.

• If a string, it should be an alias for one of the Ext.data.summary types.
• If an object, a config for one of the Ext.data.summary types.
• If a function, it should match the signature for calculate.

Defaults to:

null

Available since: 6.5.0

unique : Boolean

true if the value of this field is unique amongst all instances. When used with a reference this describes a "one-to-one" relationship. It is almost always the case that a unique field cannot also be nullable.

Defaults to:

false

validators : Object[]

An array of Ext.data.validator.Validator for this field. These validators will only be passed a field value to validate.

calculated : Boolean

readonly ro

This property is true if this field has a calculate method or a convert method that operates on the entire record as opposed to just the data value. This property is determined from the length of the convert function which means this is not calculated:

 convert: function (value) {
     return ...
 }

While this is calculated:

 convert: function (value, record) {
     return ...
 }

NOTE: It is recommended for such fields to use calculate or explicitly specify the fields used by convert using depends.

Defaults to:

false

defaultInvalidMessage : String

The default message to present for an invalid field.

Defaults to:

'This field is invalid'

Available since: 5.0.0

definedBy : Ext.Class

The class (derived from Ext.data.Model) that defined this field.

 Ext.define('MyApp.models.Foo', {
     extend: 'Ext.data.Model',

     fields: [
         { name: 'bar' }
     ],
     ...
 });

 var barField = MyApp.models.Foo.getField('bar');

 alert(barField.definedBy === MyApp.models.Foo); // alerts 'true'

When a field is inherited, this value will reference the class that originally defined the field.

 Ext.define('MyApp.models.Base', {
     extend: 'Ext.data.Model',

     fields: [
         { name: 'foo' }
     ],
     ...
 });

 Ext.define('MyApp.models.Derived', {
     extend: 'MyApp.models.Base',

     fields: [
         { name: 'bar' }
     ],
     ...
 });

 var fooField = MyApp.models.Derived.getField('foo');

 alert(fooField.definedBy === MyApp.models.Base); // alerts 'true'

Defaults to:

null

factoryConfig : Object

If this property is specified by the target class of this mixin its properties are used to configure the created Ext.Factory.

identifier : Boolean

readonly ro

This property is set to true if this is an id field.

Defaults to:

false

ordinal : Number

The position of this field in the Ext.data.Model in which it was defined.

Defaults to:

undefined

collate ( value1, value2 ) : Number

Compares two values to retrieve their relative position in sort order, taking into account any sortType. Also see compare.

Parameters

Returns

compare ( value1, value2 ) : Number

Compares two values to retrieve their relative position in sort order. Also see collate.

Parameters

Returns

convert ( value, record ) : Mixed

A function which converts the value provided by the Reader into the value that will be stored in the record. This method can be overridden by a derived class or set as a convert config.

If configured as null, then no conversion will be applied to the raw data property when this Field is read. This will increase performance. but you must ensure that the data is of the correct type and does not need converting.

Example of convert functions:

function fullName(v, record){
    return record.data.last + ', ' + record.data.first;
}

function location(v, record){
    return !record.data.city ? '' : (record.data.city + ', ' + record.data.state);
}

Ext.define('Dude', {
    extend: 'Ext.data.Model',
    fields: [
        {name: 'fullname',  convert: fullName},
        {name: 'firstname', mapping: 'name.first'},
        {name: 'lastname',  mapping: 'name.last'},
        {name: 'city', defaultValue: 'unknown'},
        'state',
        {name: 'location',  convert: location}
    ]
});

// create the data store
var store = Ext.create('Ext.data.Store', {
    model: 'Dude',
    proxy: {
        type: 'memory',
        reader: {
            type: 'json',
            rootProperty: 'daRoot',
            totalProperty: 'total'
        }
    }
});

var myData = [
    { key: 1,
      name: { first: 'Fat',    last:  'Albert' }
      // notice no city, state provided in data object
    },
    { key: 2,
      name: { first: 'Barney', last:  'Rubble' },
      city: 'Bedrock', state: 'Stoneridge'
    },
    { key: 3,
      name: { first: 'Cliff',  last:  'Claven' },
      city: 'Boston',  state: 'MA'
    }
];

Parameters

Returns

destroy

This method is called to cleanup an object and its resources. After calling this method, the object should not be used any further in any way, including access to its methods and properties.

To prevent potential memory leaks, all object references will be nulled at the end of destruction sequence, unless clearPropertiesOnDestroy is set to false.

destroyMembers ( args )

Destroys member properties by name.

If a property name is the name of a config, the getter is not invoked, so if the config has not been initialized, nothing will be done.

The property will be destroyed, and the corrected name (if the property is a config and config names are prefixed) will set to null in this object's dictionary.

Parameters

getAllowBlank

getAllowNull

getConfig ( [name], [peek], [ifInitialized] ) : Object

Returns a specified config property value. If the name parameter is not passed, all current configuration options will be returned as key value pairs.

Parameters

Returns

getConvert

getDefaultValue

getDepends

getInitialConfig ( [name] ) : Object/Mixed

Returns the initial configuration passed to the constructor when instantiating this class.

Given this example Ext.button.Button definition and instance:

Ext.define('MyApp.view.Button', {
    extend: 'Ext.button.Button',
    xtype: 'mybutton',

    scale: 'large',
    enableToggle: true
});

var btn = Ext.create({
    xtype: 'mybutton',
    renderTo: Ext.getBody(),
    text: 'Test Button'
});

Calling btn.getInitialConfig() would return an object including the config options passed to the create method:

xtype: 'mybutton',
renderTo: // The document body itself
text: 'Test Button'

Calling btn.getInitialConfig('text')returns 'Test Button'.

Parameters

Returns

getMapping

getName

getPersist

getSortType

getSummary

getType String

Gets a string representation of the type of this field.

Returns

hasMapping Boolean

Checks if this field has a mapping applied.

Returns

isEqual ( value1, value2 ) : Boolean

Tests whether two values are equal based on this field type. This uses the compare method to determine equality, so this method should generally not be overridden.

Parameters

Returns

serialize ( value, record ) : String

A function which converts the Model's value for this Field into a form which can be used by whatever Ext.data.writer.Writer is being used to sync data with the server.

Parameters

Returns

setConfig ( name, [value] ) : Ext.Base

chainable ch

Sets a single/multiple configuration options.

Parameters

Returns