(Quick Reference)
render
目的
Purpose
To render different forms of responses from simple text responses, to view and templates.
使用例
Examples
// renders text to response
render "some text"// renders text for a specified content-type/encoding
render(text: "<xml>some xml</xml>", contentType: "text/xml", encoding: "UTF-8")// render a template to the response for the specified model
def theShining = new Book(title: 'The Shining', author: 'Stephen King')
render(template: "book", model: [book: theShining])// render each item in the collection using the specified template
render(template: "book", collection: [b1, b2, b3])// render a template to the response for the specified bean
def theShining = new Book(title: 'The Shining', author: 'Stephen King')
render(template: "book", bean: theShining)// render the view with the specified model
def theShining = new Book(title: 'The Shining', author: 'Stephen King')
render(view: "viewName", model: [book: theShining])// render the view with the controller as the model
render(view: "viewName")// render some markup to the response
render {
div(id: "myDiv", "some text inside the div")
}// render some XML markup to the response
render(contentType: "text/xml") {
books {
for (b in books) {
book(title: b.title, author: b.author)
}
}
}// render a JSON ( http://www.json.org ) response with the builder attribute:
render(contentType: "application/json") {
book(title: b.title, author: b.author)
}// render with status code
render(status: 503, text: 'Failed to update book ${b.id}')// Automatic marshalling of XML and JSON
import grails.converters.*
…
render Book.list(params) as JSON
render Book.get(params.id) as XML// render a file
render(file: new File(absolutePath), fileName: "book.pdf")詳細
Description
A multi-purpose method for rendering responses to the client which is best illustrated with a few examples! Warning - this method does not always support multiple parameters. For example, if you specify both collection and model, the model parameter will be ignored.
Parameters
Parameters:
text (optional) - The text to renderbuilder (optional) - The builder to use when rendering markupview (optional) - The view to delegate the rendering totemplate (optional) - The template to render. A template is usually an HTML snippet and the file starts with an underscore ("_"). This is used mostly in AJAX requests.layout (optional) - The layout to use for the responsevar (optional) - The name of the variable to be passed into a template, defaults to the Groovy default argument 'it' if not specifiedbean (optional) - The bean to use in renderingmodel (optional) - The model to use in renderingcollection (optional) - For rendering a template against each item in a collectioncontentType (optional) - The contentType of the responseencoding (optional) - The encoding of the responseconverter (as single non-named first parameter) - A Converter that should be rendered as Responseplugin (optional) - The plugin to look for the template instatus (optional) - The HTTP status code to usefile (optional) - The byte, java.io.File, or inputStream you wish to send with the responsefileName (optional) - For specifying an attachment file name while rendering a file.
