I would like to recognize in template form.html.eex which action from new.html.eex or edit.html.eex.
I would like to change button label.
<% if #action == :create do %>
<%= submit "NEW" %>
<% else %>
<%= submit "UPDATE" %>
<% end %>
You're looking for Phoenix.Controller.action_name(#conn).
Of course, you can pass it to the template as #action with, in your controller:
conn
|> assign(:action, action_name(conn))
# ...
|> render(...)
But if you use it often, you can override the action function in lib/<your_app>_web.ex:
def controller do
quote do
# ...
def action(conn, _) do
action = action_name(conn)
conn = conn
|> assign(:action, action)
apply(__MODULE__, action, [conn, conn.params])
end
end
end
You pass it in from the templates. You can actually pass as many key/value pairs as you like.
For example you might have a templates/user/edit.html.eex like this:
<h2><%= gettext("Edit user") %></h2>
<%= render "form.html", changeset: #changeset,
is_admin?: #is_admin?, user: #user, lang_select: #lang_select,
action: user_path(#conn, :update, #user) %>
<%= link gettext("Back"), to: user_path(#conn, :show, #user) %>
You would just pass in one more key/value pair. Since #action is created by Phoenix generators to be the form action, you could just name yours submit_text or whatever makes sense to you. From inside the form template, it would be available like this:
<%= submit #submit_text %>
Related
I'm learning Ruby on Rails at the moment and we're making a blog app to learn about crud actions and such and I'm stuck on this create method in my controller not working as it does in the course. I'm having trouble the create method in this controller:
class ArticlesController < ApplicationController
def show
#article = Article.find(params[:id])
end
def index
#articles = Article.all
end
def new
end
def create
#article = Article.new(params.require(:article).permit(:title, :description))
#article.save
redirect_to #article
end
end
I get this error when trying to create an article:
ActionController::ParameterMissing in ArticlesController#create
param is missing or the value is empty: article
It seems to be getting hung up on the first line of the create method but I'm not sure why it doesn't think there's an article... Here's my new article view as well for further reference:
<h1>Create a new Article</h1>
<%= form_with scope: #article, url: articles_path, local: true do |f| %>
<p>
<%= f.label :title %><br/>
<%= f.text_field :title %>
</p>
<p>
<%= f.label :description %><br/>
<%= f.text_area :description %>
</p>
<p>
<%= f.submit %>
</p>
<% end %>
Check whether your parameters coming under hash with key article like this -
{"article"=>{params}}
Also initiate Article object in new action.
You can redefine the params to permit like this:
in controller new method create object
#article = Article.new
and in form HTML add one more option use method: "post"
I really don't get how to use Ajax with Ruby on Rails. I must be missing something simple.
What I want to do is to ask the user to select a date, and then make a table of documents appear, but only with the selected date (Date is an attribute of Document).
My idea is to create a local variable witch is not in my database, store the selected date in it, and then create a loop in my view saying for example #document.where(:date = date).each...
In app/controllers/documents_controller.rb, I have :
class DocumentsController < ApplicationController
def information
#documents = Document.all
#date = params[:date]
respond_to do |format|
format.html # index.html.erb
format.js{}
format.json { render json: #documents}
end
end
end
And in app/views/documents/_information.js.erb, I have:
<%= form_tag(document, :remote => true) do %>
<%= label_tag(:date, "The selected date is:") %>
<%= text_field_tag(:date) %>
<%= submit_tag %>
<% end %>
In the end, I have a field where the user puts his date, but the submit button doesn't do anything.
What do I miss ?
As discussed you need to change the flow of your app.Lets go through steps one by one
a. create your input field where you are selecting your date field. You already have your form for that
<%= form_tag(you_path_for_information_method, :remote => true) do %>
<%= label_tag(:date, "The selected date is:") %>
<%= text_field_tag(:date) %>
<%= label_tag(:portfolio, "Add portfolio") %>
<%= text_field_tag(:portfolio) %>
<%= submit_tag %>
<% end %>
In controller
def information
#documents = Document.all
#date = params[:date]
#portfolio = Portfolio.find(params[:portfolio])
respond_to do |format|
format.js{}
end
end
In your information.js.erb you can have:
$("#some_id_of_parent").html("<%=j render partial: "your_partial", locals: {portfolio: #portfolio} %>")
I'm building a Todo list in rails trying to learn how it all works. I'm having an issue with calling the action of a controller from the view of another controller.
I have a TodoList has_many TodoItem and TodoItem belongs_to TodoList.
TodoList#Model
has_many :todo_items
def has_completed_items?
todo_items.complete.size > 0
end
def has_incompleted_items?
todo_items.incomplete.size > 0
end
TodoItem#Model
belongs_to :todo_list
scope :complete, -> { where("completed_at is not null") }
scope :incomplete, -> { where(completed_at: nil) }
def completed?
!completed_at.blank?
end
Routes
resources :todo_lists do
resources :todo_items do
member do
patch :complete
end
end
end
Patch generates this route:
complete_todo_list_todo_item PATCH
/todo_lists/:todo_list_id/todo_items/:id/complete(.:format)
todo_items#complete
Now I can call this path from my TodoItem views without a problem like this: <%= link_to "Mark", complete_todo_list_todo_item_path(todo_item), method: :patch %>
After adding complete/incomplete scope to my TodoItem I added the following to my TodoList show view:
TodoList#Show
<% #todo_list.has_incompleted_items? %>
<% #todo_list.todo_items.incomplete.each do |item| %>
<li><%= item.content %></li>
<% end %>
This is properly displaying the incomplete items, so I tried to put a link to mark the item complete from within this view like this:
<% #todo_list.has_incompleted_items? %>
<% #todo_list.todo_items.incomplete.each do |item| %>
<li><%= item.content %>
<%= link_to "Mark", complete_todo_list_todo_item_path(item), method: :patch %></li>
<% end %>
Now this is where I get the following error:
NoMethodError in TodoLists#show undefined method
`complete_todo_list_todo_items_path' for #<#:0x000001071cf540>
Why is this complete#action undefined from my TodoList#show view?
What is the proper convention to share actions between controllers?
Thank you for your help.
I was able to solve this problem by removing the member block from the routes file:
resources :todo_lists do
resources :todo_items do
patch :complete
end
end
Now my action route was updated to: todo_list_todo_item_complete
So from my view I had to call the new route with it's nested resource:
link_to "Mark", todo_list_todo_item_complete_path(#todo_list, item), method: :patch
Lastly I had to update my controller to locate the proper todo_item#id in the complete block:
#todo_item = #todo_list.todo_items.find(params[:todo_item_id])
I finished Michael Hartl's Ruby on Rails Tutorial. Now I'm working on the suggested exercises. The application he builds is basically a Twitter clone where one can post Microposts and they appear in your feed http://ruby.railstutorial.org/chapters/user-microposts#fig-micropost_created
The main page is in home.html.erb from the StaticPagesController and features a Micropost textbox where one can post Microposts. The code for the textbox looks like so:
<%= form_for(#micropost) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<div class="field">
<%= f.text_area :content, placeholder: "Compose new micropost..." %>
</div>
<%= f.submit "Post", class: "btn btn-large btn-primary" %>
<% end %>
The #micropost variable is initialized in the StaticPagesController like so:
class StaticPagesController < ApplicationController
def home
if signed_in?
#micropost = current_user.microposts.build
end
end
Now inside the MicropostsController there's a create action like so:
def create
#micropost = current_user.microposts.build(params[:micropost])
if #micropost.save
flash[:success] = "Micropost created!"
redirect_to root_url
else
#feed_items = []
render 'static_pages/home'
end
end
My question is what is the purpose of the first #micropost variable as opposed to the second?
thanks,
mike
The first #micropost becomes available to the view rendered by the first controller method; the second #micropost becomes available to the view rendered by the second controller method. And it just so happens that the two methods are rendering the same view.
The only wrinkle is that since the second controller is conditional. If the create succeeds (passes validation and saves) then there's a redirect, so there's no proper view (although there will be in a moment, after the client-side redirect). But if it fails, then the view gets an object that contains the user-entered values as well as the validation errors which the view can then show to the user.
I would like to enable edit-in-place functionality in a View that displays values from different models:
This is what I use currently and it does NOT work, but would like some alternatives:
I have a model called Campaign. In the controller, I do the following to list, in order, the three Models that belong_to a Campaign:
<% #campaign_events = campaign_events %>
<% #campaign_events.each do |campaign_event| %>
<% model_name = campaign_event.class.name.tableize.singularize %>
<p>
<%= link_to campaign_event.title, send("#{model_name}_path", campaign_event) %>
<span class='model_name'>(<%= model_name.capitalize %>)</span>
<%= campaign_event.days %> Days
</p>
<% end %>
campaign_event is a campaign_helper defined as:
module CampaignsHelper
def campaign_events
return (#campaign.calls + #campaign.emails + #campaign.letters).sort{|a,b| a.days <=> b.days}
end
end
I want to be able to click on the numerical value for Days when looking at the view/campaign/show and edit the value for :days (in this case, displayed as campaign_event.days
I'm not really sure about it, but I'll try to help... I believe something like the following may work for you:
# calls controller
in_place_edit_for :call, :days
# emails controller
in_place_edit_for :email, :days
# letters controller
in_place_edit_for :letter, :days
# campaign view
<% #campaign_events = campaign_events %>
<% #campaign_events.each do |campaign_event| %>
<% controller_name = campaign_event.class.name.tableize %>
<% model_name = controller_name.singularize %>
<p>
<%= link_to campaign_event.title,
send("#{model_name}_path", campaign_event) %>
<span class='model_name'>(<%= model_name.capitalize %>)</span>
<%= in_place_editor_field model_name, :days, {},
:url => {
:controller => controller_name,
:action => 'set_#{model_name}_title',
:id => campaign_event.id} %> Days
</p>
<% end %>
There's somethings I don't know exactly how to do:
1) in_place_editor_field model_name
I believe this won't work, but I don't know how to pass the model_name.
2) :action => 'set_#{controller_name}_title'
Not sure about it also. Just doesn't look right.
Anyway, hope it helps you... and forgive me if this is completely stupid.