I am using Ruby on Rails 3.0.7 and I would like to understand how can I handle the following situation to avoid the istance variable #photo overriding on loading the view.
In my view file I have:
<div>
<%=
render :partial => 'user/photos',
:locals => {
:photo => #photo = 'test_photo1.jpg',
}
%>
</div>
<div>
<%=
render :partial => 'user/photos',
:locals => {
:photo => #photo = 'test_photo2.jpg',
}
%>
</div>
If I load the above view I have a strange behavior on outputting. That seams that the #photo class is overwritten (by the second rendering statement) when the page loads. Of course if I make only one rendering all works.
How can I solve the above problem in order to properly pass variables?
Note: I can not change the #photo name. That is, it must be the same for both partial templates.
I also tryed this version just deleting the #photo variable
<div>
<%=
render :partial => 'user/photos',
:locals => {
:photo => 'test_photo1.jpg',
}
%>
</div>
<div>
<%=
render :partial => 'user/photos',
:locals => {
:photo => 'test_photo2.jpg',
}
%>
</div>
but that still doesn't work.
<div>
<%=
render :partial => 'user/photos',
:locals => {:photo = 'test_photo2.jpg'}
%>
</div>
Try that, I dont know why you had :photo => #photo = 'test_photo2.jpg'
Also see the Rails guides on partials. They really let you have a good grasp of the basics.
Related
++ edited to change the question to call partial recursively ++
I am writing this question after a lot of days of frustration about this simple piece of code which isn't working. I have read numerous issues with passing partials on stackoverflow and tried all the solutions I could but it doesn't work.
Calling the partial works for the first loop but from second onwards it bombs with an error
"undefined local variable or method `count' for #<#:0x2f12670>"
Notice here that the error contains a class within a class, so something fishy is happening when the partial is being called recursively.
I have a partial called _form.html.erb which calls another partial _rule_action_fields.html.erb. I need to pass a variable from the form partial to the rule_action_field partial and here is the code:
_form.html.erb: (Please note that the builder object here is being passed from code I have not pasted)
<% #folder_count = 1 %>
<% #rule.rule_actions.each do |ruleaction| %>
<%= f.fields_for :rule_actions, ruleaction do |builder| %>
<%= render( :partial => 'rule_action_fields', :locals => { :f => builder, :count => #folder_count } ) %>
<% end %>
<% #folder_count = #folder_count + 1 %>
<% end %>
_rule_action_fields.html.erb
<p id="folder_fields">
<%= count %>
<label class="form_label">Move the files to </label>
<%= f.select(:folder_id, current_user.folders.collect { |p| [p.name,p.id] }, {:include_blank => true } ) %>
</p>
Unfortunately I cant call this partial with a collection of rule_actions because of some logic which is partially in the calling code and partially in the rule_action_fields partial.
Other syntax I have tried:
<%= render :partial => 'rule_action_fields',:f => builder, :locals => { :count => folder_count } %>
<%= render :partial => 'rule_action_fields', locals => { :count => folder_count } %>
<%= render 'rule_action_fields', :count => folder_count %>
Any ideas?
How can I pass a is_featured = true to the following partial?
<%= render :partial => 'stores', :collection => #stores %>
I only need to pass the is_featured in one place (in all other places I call the partial as above.
You can use the locals option of render
<%= render :partial => 'stores', :collection => #stores, :locals => { :is_featured => is_featured } %>
In the partial you would access it as a method:
<%= is_featured %>
In my new.html.erb page, i use the following line to render a partial and it works fine.
<%= render :partial => "submissions/player_form", :locals => { :submission => #submission } %>
Now i want to render exactly the same partial via RJS
<p>Player Type: <%= f.select(:PLAYER_TYPE, $playersList, {:prompt => 'Select the Player Type'} %></p>
<%= observe_field("submission_PLAYER_TYPE", :frequency => 1,
:url => { :controller => 'submissions',
:action => :display_player_form },
:with => "'player='+value") %>
display_player_form.rjs:
page.replace_html 'observed_assay_form', :partial => 'submissions/player_form', :locals => {:submission => #submission }
Nothing is displayed!!
Am i missing something??
Thanks for helping me out with this :)
I finally figured it out. So here are my findings:
In the partial, include the form_for tag, just like in the original form--
<% form_for #object do |f| %>
In the action used when observing the field, in my case, 'display_player_form', create a new instance of the object(see below)
#object = Object.new
In your rjs file, enter the following:
page['id of div'].replace_html :partial => 'your_partial_name'
There you go...
Hope this helps
I would rename display_player_form.rjs to display_player_form.js.erb and have its contents look like this:
$("#observed_essay_form").html('<%=
escape_javascript(
render :partial => 'submissions/player_form', :locals => {:submission => #submission }
)
-%>');
$("img[src$='spinner.gif']:visible").hide(); // optional - hide any visible spinner.gif images
I use jQuery, not Prototype, by the way.
I am trying to create a tabbed interface using the prototype helper method "replace_html." I have three different partials I am working with. The first one is the 'main tab' and it is loaded automatically like so:
<div id = "grid">
<% things_today = things.find_things_today %>
<%= render :partial => "/todaything", :collection => things_today, :as =>:thing %>
</div>
...which works fine. Similarly, I have a _tomorrowthing partial which would replace the content in the 'grid' div like so:
<%things_tomorrow = things.find_things_tomorrow%>
<%= link_to_function('Tomorrow',nil, :id=>'tab') do |page|
page.replace_html 'grid' , :partial => '/tomorrowthing',:collection => things_tomorrow, :as => :thing
end %>
If I click on this tab nothing happens at all. Using firebug, the only errors I find are a missing ) after argument list which is contained in the Element.update block where the link_to_function is called. What am I doing wrong?
Hey Jack i try to reproduce the same but i can't i never used link_to_function before but
Following code may help to achieve the same you want
<%= link_to_remote "Today Thing", :url=>{:action=>"things", :id=>'today'}%>
<%= link_to_remote "Tomorrow Thing", :url=>{:action=>"things", :id=>'tomorrow'}%>
<div id = "grid">
<% #things = things.find_things_today %>
<%= render :partial => "/todaything", :collection => #things %>
</div>
in controller
def things
#things= (params[:id]=="today")? things.find_things_today : things.find_things_tomorrow
render :update do |page|
page.replace_html 'grid', :partial => (params[:id]=="today")? "/todaything" : '/tomorrowthing' , :objects=> #things
end
I'm trying to learn Rails better by looking at example applications, and while looking at this line of the source of railscasts.com, I noticed it does this:
<div class="episodes">
<%= render #episodes %>
</div>
What exactly is going on here? Why isn't this documented on the render function? Or is it?
This is a handy shortcut for doing
<%= render :partial => "episode", :collection => #episodes %>
which is another way of doing
<% for episode in #episodes do %>
<%= render :partial => "episode", :locals => { :episode => episode }
<% end %>
which is pretty obvious in what it does :)
Hope that makes sense :)
btw it's really surprising I couldn't find the docs for this too.
This is shorthand for
render :partial => "episode", :collection => #episodes
The form above is documented in the Rails API docs under render (ActionController::Base). The shorthand form is not documented as far as I can see except in the Rails Guides.
This is a new shortcut:
<%= render #episodes %>
# equivalent to
<%= render :partial => 'episode', :collection => #episodes %>
You can also do shortcuts with single items
<%= render 'comment', comment => #comment %>
# equivalent to
<%= render :partial => 'comment', :locals => {:comment => #comment} %>