Golang view.New函數代碼示例

// HandleHome displays a list of stories using gravity to order them
// used for the home page for gravity rank see votes.go
// responds to GET /
func HandleHome(context router.Context) error {

	// Build a query
	q := stories.Query().Limit(listLimit)

	// Select only above 0 points,  Order by rank, then points, then name
	q.Where("points > 0").Order("rank desc, points desc, id desc")

	// Set the offset in pages if we have one
	page := int(context.ParamInt("page"))
	if page > 0 {
		q.Offset(listLimit * page)
	}

	// Fetch the stories
	results, err := stories.FindAll(q)
	if err != nil {
		return router.InternalError(err)
	}

	// Render the template
	view := view.New(context)
	setStoriesMetadata(view, context.Request())
	view.AddKey("page", page)
	view.AddKey("stories", results)
	view.Template("stories/views/index.html.got")

	if context.Param("format") == ".xml" {
		view.Layout("")
		view.Template("stories/views/index.xml.got")
	}

	return view.Render()

}

// HandleHome serves a get request at /
func HandleHome(context router.Context) error {
	// Setup context for template
	view := view.New(context)

	// Authorise
	err := authorise.Path(context)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// If nothing exists, redirect to set up page
	if missingUsersAndPages() {
		return router.Redirect(context, "/fragmenta/setup")
	}

	page, err := pages.Find(1)
	if err != nil {
		return router.InternalError(err)
	}

	view.AddKey("page", page)
	view.AddKey("meta_title", page.Name)
	view.AddKey("meta_desc", page.Summary)
	view.AddKey("meta_keywords", page.Keywords)

	return view.Render()

}

// HandleShow displays a single story
func HandleShow(context router.Context) error {

	// Find the story
	story, err := stories.Find(context.ParamInt("id"))
	if err != nil {
		return router.InternalError(err)
	}

	// Find the comments for this story
	// Fetch the comments
	q := comments.Where("story_id=?", story.Id).Order(comments.RankOrder)
	rootComments, err := comments.FindAll(q)
	if err != nil {
		return router.InternalError(err)
	}

	// Render the template
	view := view.New(context)
	view.AddKey("story", story)
	view.AddKey("meta_title", story.Name)
	view.AddKey("meta_desc", story.Summary)
	view.AddKey("meta_keywords", story.Name)
	view.AddKey("comments", rootComments)
	view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))

	return view.Render()
}

// HandleShow displays a single story
func HandleShow(context router.Context) error {

	// Find the story
	story, err := stories.Find(context.ParamInt("id"))
	if err != nil {
		return router.InternalError(err)
	}

	// Redirect requests to the canonical url
	if context.Path() != story.URLShow() {
		return router.Redirect(context, story.URLShow())
	}

	// Find the comments for this story
	// Fetch the comments
	q := comments.Where("story_id=?", story.Id).Order(comments.RankOrder)
	rootComments, err := comments.FindAll(q)
	if err != nil {
		return router.InternalError(err)
	}

	// Render the template
	view := view.New(context)
	view.AddKey("story", story)
	view.AddKey("meta_title", story.Name)
	view.AddKey("meta_desc", story.Summary)
	view.AddKey("meta_keywords", story.Name)
	view.AddKey("comments", rootComments)

	return view.Render()
}

// errHandler renders an error using error templates if available
func errHandler(context router.Context, e error) {

	// Cast the error to a status error if it is one, if not wrap it in a Status 500 error
	err := router.ToStatusError(e)

	view := view.New(context)

	view.AddKey("title", err.Title)
	view.AddKey("message", err.Message)

	if !context.Production() {
		view.AddKey("status", err.Status)
		view.AddKey("file", err.FileLine())
		view.AddKey("error", err.Err)
	}

	view.Template("app/views/error.html.got")

	// Log 404 as info only
	if err.Status == 404 {
		context.Logf("#info %s\n", err)
	} else {
		context.Logf("#error %s\n", err)
	}

	view.Render()
}

// HandleUpdateShow renders the form to update a post
func HandleUpdateShow(context router.Context) error {

	// Find the post
	post, err := posts.Find(context.ParamInt("id"))
	if err != nil {
		return router.NotFoundError(err)
	}

	// Authorise update post
	err = authorise.Resource(context, post)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Find users for author details
	users, err := users.FindAll(users.Admins())
	if err != nil {
		return router.NotFoundError(err)
	}

	// Render the template
	view := view.New(context)
	view.AddKey("post", post)
	view.AddKey("users", users)
	return view.Render()
}

// HandleShowHome serves our home page
func homeHandler(context router.Context) error {

	view := view.New(context)
	view.AddKey("title", "Fragmenta app")
	view.Template("app/views/home.html.got")
	return view.Render()
}

// HandleIndex displays a list of files
func HandleIndex(context router.Context) error {

	// Authorise
	err := authorise.Path(context)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Find the current user and check status
	u := authorise.CurrentUser(context)
	if u.Anon() {
		//	return router.NotAuthorizedError(err)
	}

	// For admins, show all files, order by date desc
	q := files.Query().Order("updated_at desc")

	// otherwise show just the logged in user's files
	if !u.Admin() {
		// Find the files for this user, unless
		q = files.Where("user_id=?", u.Id)
	}

	// Fetch the files
	results, err := files.FindAll(q)
	if err != nil {
		return router.InternalError(err)
	}

	// Render the template
	view := view.New(context)
	view.AddKey("files", results)
	return view.Render()

}

// HandleHome displays a list of stories using gravity to order them
// used for the home page for gravity rank see votes.go
func HandleHome(context router.Context) error {

	// Build a query
	q := stories.Query().Limit(listLimit)

	// Select only above 0 points,  Order by rank, then points, then name
	q.Where("points > 0").Order("rank desc, points desc, id desc")

	// Fetch the stories
	results, err := stories.FindAll(q)
	if err != nil {
		return router.InternalError(err)
	}

	// Render the template
	view := view.New(context)
	view.AddKey("stories", results)
	view.AddKey("meta_title", "Golang News")
	view.AddKey("meta_desc", "News for Go Hackers, in the style of Hacker News. A curated selection of the latest links about the Go programming language.")
	view.AddKey("meta_keywords", "golang news, blog, links, go developers, go web apps, web applications, fragmenta")
	view.AddKey("authenticity_token", authorise.CreateAuthenticityToken(context))

	view.Template("stories/views/index.html.got")
	return view.Render()

}

// HandleIndex serves a get request at /pages
func HandleIndex(context router.Context) error {

	// Authorise
	err := authorise.Path(context)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Fetch the pages
	q := pages.Query().Order("url asc")

	// Filter if necessary
	filter := context.Param("filter")
	if len(filter) > 0 {
		filter = strings.Replace(filter, "&", "", -1)
		filter = strings.Replace(filter, " ", "", -1)
		filter = strings.Replace(filter, " ", " & ", -1)
		q.Where("(to_tsvector(name) || to_tsvector(summary) || to_tsvector(url) @@ to_tsquery(?) )", filter)
	}

	pageList, err := pages.FindAll(q)
	if err != nil {
		context.Logf("#error Error indexing pages %s", err)
		return router.InternalError(err)
	}

	// Serve template
	view := view.New(context)
	view.AddKey("filter", filter)
	view.AddKey("pages", pageList)
	return view.Render()

}

// HandleShow serve a get request at /users/1
func HandleShow(context router.Context) error {

	// Find the user
	user, err := users.Find(context.ParamInt("id"))
	if err != nil {
		context.Logf("#error parsing user id: %s", err)
		return router.NotFoundError(err)
	}

	userMeta := fmt.Sprintf("%s – %s", user.Name, user.Summary)

	// Set up view
	view := view.New(context)

	// Find the first image which matches this user
	image, err := images.Find(user.ImageID)
	if err == nil {
		// only add image key if we have one
		view.AddKey("image", image)
	}

	// Render the Template
	view.AddKey("user", user)
	view.AddKey("meta_title", userMeta)
	view.AddKey("meta_desc", userMeta)
	view.AddKey("meta_keywords", user.Keywords())
	return view.Render()

}

// errHandler renders an error using error templates if available
func errHandler(context router.Context, e error) {

	// Cast the error to a status error if it is one, if not wrap it in a Status 500 error
	err := router.ToStatusError(e)

	view := view.New(context)

	view.AddKey("title", err.Title)
	view.AddKey("message", err.Message)

	if !context.Production() {
		view.AddKey("status", err.Status)
		view.AddKey("file", err.FileLine())
		view.AddKey("error", err.Err)
	}

	// Set the status correctly for errors
	context.Writer().WriteHeader(err.Status)

	// Use our error template
	view.Template("app/views/error.html.got")

	context.Logf("#error %s\n", err)
	view.Render()
}

// HandleCreateShow serves the create form via GET for posts
func HandleCreateShow(context router.Context) error {

	// Authorise
	err := authorise.Path(context)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Find users for author details
	users, err := users.FindAll(users.Admins())
	if err != nil {
		return router.NotFoundError(err)
	}

	// Render the template
	view := view.New(context)
	post := posts.New()

	user := authorise.CurrentUser(context)
	if user != nil {
		post.AuthorId = user.Id
	}

	view.AddKey("post", post)
	view.AddKey("users", users)
	return view.Render()
}

// Serve a get request at /images
//
//
func HandleIndex(context router.Context) error {

	// Authorise
	err := authorise.Path(context)
	if err != nil {
		return router.NotAuthorizedError(err)
	}

	// Setup context for template
	view := view.New(context)

	// Build a query
	q := images.Query()

	// Show only published (defaults to showing all)
	// q.Apply(status.WherePublished)

	// Order by required order, or default to id asc
	switch context.Param("order") {

	case "1":
		q.Order("created_at desc")

	case "2":
		q.Order("updated_at desc")

	case "3":
		q.Order("name asc")

	default:
		q.Order("id desc")

	}

	// Filter if necessary - this assumes name and summary cols
	filter := context.Param("filter")
	if len(filter) > 0 {
		filter = strings.Replace(filter, "&", "", -1)
		filter = strings.Replace(filter, " ", "", -1)
		filter = strings.Replace(filter, " ", " & ", -1)
		q.Where("( to_tsvector(name) || to_tsvector(summary) @@ to_tsquery(?) )", filter)
	}

	// Fetch the images
	imagesList, err := images.FindAll(q)
	if err != nil {
		return router.InternalError(err)
	}

	// Serve template
	view.AddKey("filter", filter)
	view.AddKey("images", imagesList)
	// Can we add these programatically?
	view.AddKey("admin_links", helpers.Link("Create image", images.New().URLCreate()))

	return view.Render()

}

// HandleCreateShow serves the create form via GET for users
func HandleCreateShow(context router.Context) error {

	// Render the template
	view := view.New(context)
	user := users.New()
	view.AddKey("user", user)

	return view.Render()
}