Ruby rails: view helpers
From wikinotes
Documentation
View Helpers https://api.rubyonrails.org/classes/ActionView/Helpers.html Specific Helpers formhelper https://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html urlhelper
Common Helpers
Url Helpers
See ruby rails: url helpers for details.
a_rails_route_path(...) # rails_route/a a_rails_route_url(...) # https://domain.com/rails_route/aredirect_back
Redirect back to the page you came to this one from.
redirect_back( fallback_location: .., flash: { notice: "completed blah" } )Elements
link_to
button_to
button_to("Go Here", some_rails_path(123))forms
form types
form for an action
<%= form_tag(action: "post") do %> <%= select_tag("users", options_for_select(["Alex", "Courtney", "Sam"], selected: "Courtney")) %> <%= submit_tag %> <!-- ... --> <% end %>form for creating an ActiveRecord model (id:
"new_person"
)<%= form_for(@person) do %> <%= select_tag("friends", options_for_select(["Alex", "Courtney", "Sam"], selected: "Alex")) %> <!-- ... --> <% end %>form fields
button_tag
button with icon
<%= button_tag(type: "submit") do %> <i class=" icon-repeat"></i> <% end %>select_tag
- select https://api.rubyonrails.org/files/actionview/lib/action_view/helpers/form_options_helper_rb.html
- select_tag https://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html#method-i-select_tag
<!-- select with label/value --> <!-- params={"number"=>2} --> <%= select_tag("number", options_for_select({ "a" => 1, "b" => 2})) %><!-- select from collection --> <!-- params={"letter"=>"b"} --> <%= select_tag("letter", options_for_select(["a", "b", "c"], selected: "b")) %><!-- show "Alex", save 1 --> <!-- params={"user"=>{ "id"=> 2}} --> <% select("user", "id", [["alex", 1], ["courtney", 2], ["sam", 3]]) %>submit_tag