I use /app/views/layouts/application.html.erb <html> <head> <%= yield :head %> </head> <body> <%= yield %> </body> </html>
then in the page /app/views/fo/bar.html.erb <% content_for :head do %> <title>A simple page</title> <% end %> <p>Hello, Rails!</p> This way I can add other tags to the head section. Like `meta description` and maybe `meta keywords` for individual pages. Hassan mention this link earlier. http://guides.rubyonrails.org/layouts_and_rendering.html#using-the-content-for-method HTH John On Sunday, January 14, 2018 at 9:41:17 AM UTC-5, Walter Lee Davis wrote: > > > > On Jan 13, 2018, at 11:01 PM, Robert Phillips <robert.p...@gmail.com > <javascript:>> wrote: > > > > > > > > On Sunday, 14 January 2018 00:46:39 UTC, Hassan Schroeder wrote: > > On Sat, Jan 13, 2018 at 4:18 PM, Robert Phillips > > <robert.p...@gmail.com> wrote: > > > > > So, what it is doing is rails is taking its own template then it dumps > my template into its <body></body> > > > > Yep, that's the way it works, though "template" is the wrong word. > > > > This: http://guides.rubyonrails.org/layouts_and_rendering.html > > may help. > > > > If you want something within the scope of a layout like a title to be > > dynamic you can assign the value in your controller and pass it in > > as a variable, e.g. <title>@title</title> > > > > > > > > Thanks, I can see what was happening now.. > > > > Whatever view is displayed, if displays the html from here > > > > .\app\views\layouts\application.html.erb > > > > which specifies a title and some other tags. > > > > And that file says > > > > <body> > > <%= yield %> > > </body> > > > > > > And then so when trying to access '/', it went to some specified > controller some action, e.g. blah#bleh, then it rendered the > application.html.erb file, and inserted within it, the blah\bleh.html.erb > file. A fix was to rename application.html.erb > > > > Why is template not an appropriate name.. Isn't any ERB file a > template, since you can insert data into it? > > > > Also I notice that when I do root 'application#a' and I have in my > application controller def a end, then I http to '/' then it runs the > action but it can't find the template.. Is there anywhere that I can put > a.html.erb that the rails server would find it? Or does the application > controller not have a corresponding template for each action? > > > > I think you may be getting hung up on the word template. Rails defines two > different terms for what I suspect you are thinking of here: template and > layout. A template is specific to a particular action in a particular > controller, for example /views/widgets/show.html.erb would be a template > automatically invoked for widgets_controller.rb's show method. A template > only contains the code necessary to render the "guts" of the page, it never > includes head or html elements or any of the repeated bits you may use to > center the page or set up a grid. Think of a template as containing only > the answer to the question: "What makes this page different than any other > page in the site?" > > A layout, on the other hand, is the outermost parts of the page only, with > one line in the middle that reads <%= yield %>. That line is replaced by > everything else that has been rendered so far. (Very often you will see > that there is only one of these layouts for an entire site.) This has a > number of benefits for you as a developer. For one thing, you don't have to > repeat yourself in each template by creating all the outer page code. For > another, Rails can precompile that code and have everything ready to go > when the rest of the template sandwich is prepared for a new request. > > All of the HTML generated by Rails is created in inside-out order. For > example, partials are rendered for individual lines of a table, then the > table is rendered in a template, then the template is inserted into the > body (the layout) and the page is complete. > > When you want to make parts of the layout dynamic, as you do, then the > right place to do that is with a helper method. Helpers can be called > within the template (where the variable data is known) and then cause an > effect in the final rendering through the content_for mechanism. Here's one > that I use: > > app/helpers/application_helper.rb > > def title(content) > content_for :title, "#{content} | Site Name Here" > end > > In the application.rb.html layout, I have a title tag, like this: > > <title><%= content_for?(:title) ? yield(:title) : "Site Name Here" > %></title> > > This gives me a generic title if I haven't bothered to set it, but allows > me to pass in the title I want to show simply by setting the content_for > :title key as you saw in the helper. > > Finally, in the show template for my widget page, I would add this line > anywhere in the code (order is not important, because it will always be > rendered before the layout is): > > <%- title @widget.product_name %> > > And that sets the title on the layout for me. > > Now you could set this `content_for` value in the controller, too, but I > do it in the view because I usually add another layer to the helpers like > this: > > def headline(content) > title(content) > content_tag :h1, content > end > > So in my template, where I want the H1 tag with the page headline on it, I > simply do this: > > <%= headline @widget.product_name %> > > And now I have a perfectly matched H1 and title, for optimal SEO > performance. I put the headline in the page where I want it to appear, and > there's no additional effort to make the title tag. > > Walter > > > -- > > You received this message because you are subscribed to the Google > Groups "Ruby on Rails: Talk" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to rubyonrails-ta...@googlegroups.com <javascript:>. > > To post to this group, send email to rubyonra...@googlegroups.com > <javascript:>. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/rubyonrails-talk/bb70c7f9-1ed0-4e71-8c35-0f2c64824656%40googlegroups.com. > > > > For more options, visit https://groups.google.com/d/optout. > > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. 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