Grails Controller - respond 方法

Basic Usage

• The official document: http://docs.grails.org/latest/ref/Controllers/respond.html
• And return data objects for the page where the action statement to respond to the corresponding current.
• Front and rear ends for passing object data.
• Sometimes you need to use the return statement.
• Web URL address of the client will not change.
• respond must return an "object", and then add other model and so on.
• Responds according to the content "content negotiation" automatically adapt to the type of configuration.

Case	Parameter Type	The front end of the agreed variable
respond Book.list()	java.util.List	bookList
respond Book.get(1)	example.Book	book
respond( [1,2] )	java.util.List	integerList
respond( [1,2] as Set )	java.util.Set	integerSet
respond( [1,2] as Integer[] )	Integer[]	integerArray

def show(Long id)
{
    def layout = Layout.get(id)
    def layoutPanel = LayoutPanel.findAllByLayout(layout, [sort: 'displayOrder', order: 'asc'])
    respond layout, model: [layoutPanel: layoutPanel] // 默认的 show 页面，传递一个对象，和一组其他对象。
}
// 选择最合适的类型并转换格式进行响应
respond Book.get(1), formats: ['xml', 'json']

parameter

• object Variable needs rendering, this must happen!
• arguments The optional parameter

The optional parameter

• view - The view to use in case of HTML rendering (corresponding pages)
• model - The model to use in case of HTML rendering (corresponding to various types of data may be)
• status - The response status (corresponding status)
• formats - A list of formats to respond with
• includes - Properties to include if rendering with the converters API
• excludes - Properties to exclude if rendering with the converters API