I try to pass a param to a partial in view
controller
def addMovie
#movies = Movie.all
#vid = Movie.new
end
view
<%= render partial: "shared/videoList", videoList: :movies %>
partial
stored in app/views/sharead
<% if #videoList.present? %>
<% #videoList.each do |movie| %>
videoList is empty ... why?
Access the variable using videoList and not #videoList,
<% if videoList.present? %>
<% videoList.each do |movie| %>
also, you need to pass the variable like this
<%= render 'shared/videoList', videoList: #movies %>
Hope that helps!
Related
I'm new in ruby on rails, and I want to practice it.
I'm stuck when I want to include a view into antoher view.
I want by doing that to have my posts into another view than of posts/index
posts/index
method:
def index
#Posts = Post.all
end
view:
<% #posts = capture do %>
<% #posts.each do |post| %>
<h3>
<%= post.title %>
</h3>
<p>
<%= post.content %>
</p>
<% end %>
<% end %>
pages/index
<h1> Index Of another pages </h1>
<%= #posts %>
If you want to force your index action to render another view, then go with follow code:
def index
#Posts = Post.all
render 'pages/index'
end
Correct me if I haven't get you
It sounds to me like you need to save the reusable view code as a partial, and render it all places it's required.
To use a partial, save it down with an underscore prefix, i.e. _posts.html.erb.
This can then be rendered using:
<%= render 'path/to/posts' %>
You'll likely need to pass in the posts variable to the partial, as in the following:
<%= render 'path/to/posts', posts: #posts %>
And the change your view to use posts rather than #posts.
Update:
The result of capture is assigned to #posts, although this variable still wouldn't be available in another template - rather to be used again on the same page
Based on what you're saying about the project's structure, it sounds like you'd need the following:
in app/views/posts/_posts.html.web
<% #posts.each do |post| %>
<h3>
<%= post.title %>
</h3>
<p>
<%= post.content %>
</p>
<% end %>
In both controllers' index action:
#posts = Post.all
In the posts/index view:
<%= render 'posts' %>
In the pages/index view:
<%= render 'posts/posts' %>
I don't want to confuse things, but Rails has a little magic in there where -
alternatively - you can define a partial _post.html.erb as follows:
<h3>
<%= post.title %>
</h3>
<p>
<%= post.content %>
</p>
And simply call <%= render #posts %> in each view. This would be the best 'Railsy' way of doing things.
Let me know how you get on!
i'm new into ruby on rails and i want to assign a variable to make an each like this
<% 3.times do |calendar| %>
<% test = #lessons_calendar %>
<% test.each do |lesson| %>
display html here
<% end %>
<% end %>
The thing is that in my controller i have assigned 3 variables like this #lessons_1 #lessons_2 and #lessons_3 but when i run the code it says undefined method `each' for nil:NilClass, how can i join the number created by calendar to the new variable ? Thanks
Instead of below
<% 3.times do |calendar| %>
<% test = #lessons_calendar %>
<% test.each do |lesson| %>
display html here
<% end %>
<% end %>
Make changes in your controller as well as in view as below
Controller Code
# take new variable
#lessons = []
#lessons << #lessons_1
#lessons << #lessons_2
#lessons << #lessons_3
Now do code in view file as below
<% #lessons.each do |lesson| %>
<% lesson.each do |ls| %>
your code here
<%end%>
<%end%>
Hope this will help you.
<% 3.times do |calender| %>
<%= #lessons_calendar.collect{ |lesson| Write Your Code Here }.join("").html_safe rescue 'No Record' %>
<% end %>
With in the collect iterator you can assign it to instance var if you want to. Thanks
So I have an interesting problem I'm working on. I am trying to create multiple objects of the same model in one view. I would like to display all the possible objects in my view, check boxes to select which ones to create, then submit and create all the corresponding objects.
Now the objects to select are gotten using an API request and returned in JSON format. The JSON is then displayed on the view for the user to select, then an array containing all the selected objects is sent back to the controller for creation.
Here is the relevant code that I've tried so far.
objects_controller.rb
def new
#possible_objects = <api call to get objs>
#objects = []
end
def create
params[:objects].each do |obj|
# create and save obj
end
end
objects/new.html.erb
<% form_for #objects do |f| %>
<% #possible_objects.each do |api_obj| %>
<%= check_box_tag(api_obj["name"])%>
<%= api_obj["name"] %>
<% end %>
<%= f.submit %>
<% end %>
This is definitely not the right approach, as the form will not accept an empty array as a parameter. I'm not sure where else to go with this, any pointers in the right direction would be great. Thanks.
Thanks to MrYoshiji for pointing me in the right direction, this is what ended up working
objects_controller.rb
def
#possible_objects = <api call to get objs>
end
def create
params[:objects].each do |object|
new_obj = Object_Model.new( <params> )
new_obj.save
if !new_obj.save
redirect_to <path>, alert: new_obj.errors.full_messages and return
end
end
redirect_to <path>, notice: 'Successfully created.'
end
objects/new.html.erb
<%= form_tag objects_path(method: :post) do %>
<% #possible_objects.each do |api_obj| %>
<%= check_box_tag 'objects[]', api_obj %>
<%= possible_object["name"] %>
<% end %>
<%= submit_tag 'Create'%>
<% end %>
Can you try the following?
# view
<% form_tag my_objects_path(method: :post) do |f| %>
<% #possible_objects.each do |api_obj| %>
<%= check_box_tag 'objects[names][]', api_obj["name"] %>
<%= api_obj["name"] %>
<% end %>
<%= f.submit %>
<% end %>
# controller
def create
params[:objects][:names].each do |obj_name|
YourModelForObject.create(name: obj_name)
end
end
See this comment on the documentation of check_box_tag: http://apidock.com/rails/ActionView/Helpers/FormTagHelper/check_box_tag#64-Pass-id-collections-with-check-box-tags
I'm developing a rails application.
I want the user to be able to make a selection between an array of models
In one controller, I create an array of models.
def myController
#data = []
#data += [MyData.find(2)]
#data += [MyData.find(5)]
#data += [MyData.find(7)]
end
In the view, I can't use the form_for because can't be used in an array, so I have:
<%= form_tag 'myOp' do |f|%>
<%= fields_for :test, #data do |builder|%>
<%= render 'sub_form', :f => builder %>
<% end %>
<% end %>
Now in the sub_form, I want to recieve each of the items of the array, but instead, I'm getting the full array.
How can I get each of the items of the array in the subform?
Is there a better way to do this?
Thanks
So first in your controller
def my_action
#datas = MyData.find(2, 5, 7)
end
Then in your view
You need to iterate through the #datas array and yield the fields for each object. That is because fields_for yields fields for one object only, not arrays of objects.
<%= form_tag 'myOp' do |f|%>
<% #datas.each_with_index do |data, i| %>
<%= fields_for "test_#{i}", data do |builder|%>
<%= render 'sub_form', :f => builder %>
<% end %>
<% end %>
<% end %>
I hope this will correct the issue:
<%= form_tag 'myOp' do |f|%>
<%= fields_for :test, #data.each do |builder|%>
<%= render 'sub_form', :f => builder %>
<% end %>
<% end %>
Normally an array object can be seperated using .each method. May that would work here also. Try it.
This is my code for rendering the partial (the #parties collection is being generated correctly, I have tested that):
<% #parties.each do |party| %>
<div class="item">
<%= render 'parties/party', :object => party %>
</div>
<% end %>
And this is the code in the partial:
<%= party.name %>
However, I get the following error:
undefined method `name' for nil:NilClass
I'm at my wits end, someone please help :-|
Also, this is the code for the controller to render the view containing the partial (The controller's called default_controller):
def index
#parties = Party.all
end
Is it of any consequence that this isn't the parties_controller?
I've tried something like below and it worked
<%= render :partial => 'party', :object => party %>
and I can access like party.name. the local variable is named after the partial name which is party here.
Note: Im assuming that your both partials are of parties_controller. So this should work.
Update:
Here is what ive tried with again
class PostsController < ApplicationController
#... ...
def index
#posts = Post.all
#comments = Comment.all #<---- Loading comments from PostsController
#... ...
end
end
#views/posts/index.html.erb
<% #comments.each do |comment| %>
<%= render :partial=>"comments/comment", :object=>comment %>
<% end %>
#views/comments/_comment.html.erb
<%= comment.body %>
And its working :)