ant-design/components/form/index.en-US.md

category	type	cols	title
Components	Data Entry	1	Form

Form is used to collect, validate, and submit the user input, usually contains various form items including checkbox, radio, input, select, and etc.

Form

You can align the controls of a form using one of the following attributes：

• horizontal：to horizontally align the labels and controls of the fields. (Default)
• vertical：to vertically align the labels and controls of the fields.
• inline：to render form fields in one line.

Form fields

A form consists of one or more form fields whose type includes input, textarea, checkbox, radio, select, tag, and more. A form field is defined using <Form.Item />.

<Form.Item {...props}>
  {children}
</Form.Item>

PS：By default, large size controls are used within a form.

API

Form

more example rc-form。

Property	Description	Type	Default Value
form	Decorated by Form.create() will be automatically set this.props.form property, so just pass to form, you don't need to set it by yourself after 1.7.0.	object	n/a
vertical	Use vertical layout.	boolean	false
inline	Use inline alignment.	boolean	false
onSubmit	Defines a function will be called if form data validation is successful.	Function(e:Event)

Form.create(options)

How to use：

class CustomizedForm extends React.Component {}

CustomizedForm = Form.create({})(CustomizedForm);

The following options are available:

Property	Description	Type
onFieldsChange	Specify a function that will be called when the value a Form.Item gets changed. Usage example: saving the field's value to Redux store.	Function(props, fields)
mapPropsToFields	Convert props to corresponding field value. Usage example: reading the values from Redux store.	Function(props): Object{ fieldName: Object{ value } }

If the form has been decorated by Form.create then it has this.props.form property. this.props.form provides some APIs as follows:

Property	Description	Type
getFieldsValue	Get the specified fields' values. If you don't specify a parameter, you will get all fields' values.	Function([fieldNames: string[]])
getFieldValue	Get the value of a field.	Function(fieldName: string)
setFieldsValue	Set the value of a field.(Note: please don't use it in componentWillReceiveProps, otherwise, it will cause an endless loop, more)	Function({ [fieldName]: value }
setFields		Function(obj: object)
setFields	Set the value and error of a field. Code Sample	Function({ [fieldName]: { value: any, errors: [Error] } })
validateFields	Validate the specified fields and get theirs values and errors. If you don't specify the parameter of fieldNames, you will vaildate all fields.	Function([fieldNames: string[]], [options: object], callback: Function(errors, values))
validateFieldsAndScroll	This function is similar to validateFields, but after validation, if the target field is not in visible area of form, form will be automatically scrolled to the target field area.	same as validateFields
getFieldError	Get the error of a field.	Function(name)
isFieldValidating	Check if the specified field is being validated.	Function(name)
resetFields	Reset the specified fields' value(to initialValue) and status. If you don't specify a parameter, all the fields will be reset.	Function([names: string[]])
getFieldDecorator	Two-way binding for form, please read below for details.

this.props.form.getFieldDecorator(id, options)

After wrapped by getFieldDecorator, value(or other property defined by valuePropName) onChange(or other property defined by trigger) props will be added to form controls，the flow of form data will be handled by Form which will cause:

1. You don't need to use onChange to collect data, but you still can listen to onChange(and so on) events.
2. You can not set value of form control via value defaultValue prop, and you should set default value with initialValue in getFieldDecorator instead.
3. You don't need to call setState manually, please use this.props.form.setFieldsValue to change value programmatically.

Special attention

If you use react@<15.3.0, then, you can't use getFieldDecorator in stateless component: https://github.com/facebook/react/pull/6534

getFieldDecorator(id, options) parameters

Property	Description	Type	Default Value
id	The unique identifier is required. support nested fields format.	string
options.valuePropName	Props of children node, for example, the prop of Switch is 'checked'.	string	'value'
options.initialValue	You can specify initial value, type, optional value of children node.		n/a
options.trigger	When to collect the value of children node	string	'onChange'
options.getValueFromEvent	To convert parameters of onChange to the value of control	function(..args)	reference
options.validateTrigger	When to validate the value of children node.	string|string[]	'onChange'
options.rules	Includes validation rules. Please refer to async-validator for details.	object[]	n/a
options.exclusive	Whether it is exclusive with other controls, particularly for Radio.	boolean	false

Form.Item

Note:

• If Form.Item has multiple children that had been decorated by getFieldDecorator, help and required and validateStatus can't be generated automatically.
• Before 2.2.0, form controls must be child of Form.Item, otherwise, you need to set help, required and validateStatus by yourself.

Property	Description	Type	Default Value
label	Label text	string|ReactNode
labelCol	The layout of label. You can set span offset to something like {span: 3, offset: 12} same as with <Col>	object
wrapperCol	The layout for input controls. Same as labelCol	object
help	The prompt message. If not provided, the prompt message will be generated by the validation rule.	string|ReactNode
extra	The extra prompt message. It is similar to help. Usage example: to display error message and prompt message at the same time.	string|ReactNode
required	Whether provided or not, it will be generated by the validation rule.	boolean	false
validateStatus	The validation status. If not provided, it will be generated by validation rule. options: 'success' 'warning' 'error' 'validating'	string
hasFeedback	Used with validateStatus, this option specifies the validation status icon. Recommended to be used only with Input.	boolean	false
colon	Used with label, whether to display : after label text.	boolean	true