I'm passing the results of a multi-select box to a page so that the selections can be shown on screen. As it's multi-select, the result can either be a scalar or an array reference. Is there a way of finding this out? I can't find anything online, but I thought there might be a .array or .array_ref token that could be used for validation.
I'm using Template Toolkit, Perl and Dancer.
So here is what I've got for a scalar:
<% IF multitext %>
Text: <% multitext %>
<% END %>
What I want is something like...
<% IF multitext %>
<% IF multitext.array_ref %> <!-- whatever works! -->
<% FOREACH text IN multitext %>
Text: <% text %>
<% END %>
<% ELSE %>
Text: <% multitext %>
<% END %>
<% END %>
If <%- multitext.0 -%> returns a non-zero value, it's an arrayref.
If <%- multitext.keys.size -%> returns a non-zero value, it's a hashref.
The way I usually handle it is to force it to be an array if it's a scalar, eg:
<%- SET items = multitext.0 ? multitext : [ multitext ];
FOREACH item IN items;
...
END; -%>
Several years later...
You could use the .list vmethod to guarantee it's an array e.g.
<% FOREACH text IN multitext.list %>
Text: <% text %>
<% END %>
See http://template-toolkit.org/docs/manual/VMethods.html#section_list
Related
I am using a theme that has very specific layouts and I wanted to make a failsafe way to you rails forms.
I have a layout app/views/shared/forms/fields/_layout.html.erb
<div class="js-form-message mb-4">
<div class="js-focus-state input-group u-form">
<div class="input-group g-brd-primary--focus">
<%= yield(:field) %>
</div>
</div>
</div>
And I have two partials.
1-st partial: app/views/shared/forms/fields/_email.html.erb
<% form = locals[:form] %>
<% locals[:required] = locals[:required].nil? ? true : locals[:required] %>
<% locals[:placeholder] = locals[:placeholder] || t('forms.shared.email.placeholder') %>
<%= render layout: "shared/forms/fields/layout", locals: locals do %>
<% content_for(:field) do %>
<%= form.email_field :email,
placeholder: locals[:placeholder],
class: "form-control g-py-15 g-px-15",
"data-error-class"=>"u-has-error-v1-3",
"data-success-class"=>"u-has-success-v1-2",
"data-msg-email" => t('forms.shared.email.validate'),
"data-msg" => t('forms.shared.required'),
autofocus: locals[:autofocus],
required: locals[:required] %>
<% end %>
<% end %>
2-nd partial: app/views/shared/forms/fields/_login.html.erb
<% form = locals[:form] %>
<% locals[:required] = locals[:required].nil? ? true : locals[:required] %>
<% locals[:placeholder] = locals[:placeholder] || t('forms.shared.login.placeholder') %>
<%= render layout: "shared/forms/fields/layout", locals: locals do %>
<% content_for(:field) do %>
<%= form.email_field :login,
placeholder: locals[:placeholder],
class: "form-control g-py-15 g-px-15",
"data-error-class"=>"u-has-error-v1-3",
"data-success-class"=>"u-has-success-v1-2",
"data-msg" => t('forms.shared.required'),
autofocus: locals[:autofocus],
required: locals[:required] %>
<% end %>
<% end %>
And when I do this:
<%= render "shared/forms/fields/email", locals: {form: f} %>
<%= render "shared/forms/fields/login", locals: {form: f} %>
I get
Email Field
Email Field/Login Field
I found out that content_for 'appends' the block that you give it and then when I yield the whole block is returned.
The first time there is nothing in content_for(:field) and it appends to it Email Field. But the second time it does not clear its content and just appends Login Field to it.
I am thinking of adding additional complexity to layout.html.erb so just keeping it inline isn't an option.
Is there a way to tell to the layout only to yield the 'newest' value of content_for.
EDIT:
I wrote a method to flush after an yield, suggesting that the same key would be used again:
def yield_and_flush!(content_key)
view_flow.content.delete(content_key)
end
content_for has flush option to reset previous content:
<% content_for :field, flush: true do %>
new content here
<% end %>
The solution was this to write an yield_and_flush! method. I saw the solution here
def yield_and_flush!(content_key)
view_flow.content.delete(content_key)
end
I want to check if this array (member.team_member_designations) being passed through the template is an array or a string. If it's an array, I want it to move forward with the HTML below it, otherwise, if it's a string, to just print the string. How do I write this in the underscore template? Right now, I'm just checking for an array but want to include a check for string and the condition to print it if its a string.
HTML:
<%- _.isArray(member.team_member_designations) %>
<% _.each(buildDesignationDictionary, function(designation) { %>
<p> <%- designation.title %> </p>
<% }); %>
use <% code %> to evaluate javascript.
<% if( _.isArray(member.team_member_designations)){ %>
<% _.each(buildDesignationDictionary, function(designation) { %>
<p> <%- designation.title %> </p>
<% }) %>
<%}else if( _.isString(member.team_member_designations) ){ %>
<%- member.team_member_designations %>
<% } %>
In my controller i find a uniq notebook and user name.
but i want to be able to check in my html code that it shows only one type of user.
in controller
def index
#allnotebooks = Note.uniq.pluck(:string, :notebook)
#notes = Note.all
end
in my html
<% #allnotebooks.each do |notebook| %>
<% if notebook.string == c_user.name %>
<option><%= notebook %></option>
<% end %>
<% end %>
notebook.string does not work. what am i missing
Also you can do in different way other than using pluck, using select you can do it
like-
In controller code-
def index
#allnotebooks = Note.uniq.select([:string, :notebook])
#notes = Note.all
end
in your html
<% #allnotebooks.each do |notebook| %>
<% if notebook.string == c_user.name %>
<option><%= notebook %></option>
<% end %>
<% end %>
Thanks!!!
Pluck returns an array.
Try notebook.first or notebook[0]
Docs here: http://apidock.com/rails/ActiveRecord/Calculations/pluck
Second example at the bottom applies here.
In your example it should be:
<% #allnotebooks.each do |notebook| %>
<% if notebook[0] == c_user.name %>
<option><%= notebook[1] %></option>
<% end %>
<% end %>
btw you might want to improve this by only loading notebooks where the string equals your user's name.
I am not a good ruby guy, You can write it like
<% #allnotebooks.each_with_index do |notebook, index| %>
<%= notebook[index].string %> => <%= notebook[index].notebook %>
<% end %>
for "a" unique notebook, you do you need to loop it?
just to say:
#allnotebooks.each{|notebook| <%= notebook[0] %> <%= notebook[1] %> }
But there can be better ways.
<% temp1= "secondary" %>
<% #query = "select credentials_id from credentials where credentials_id LIKE '%" + temp1 + "%'" %>
<% Request.connection.execute(#query) %>
<% if #query.blank? %>
<p>These are no secondary users still created </p>
<% else %>
<% #query.each do |c| %>
<%= label_tag(:credentials_id,c.credentials_id)%>
<%end%>
<%end%>
I am trying to execute the code above, that I have written in my "admin.html.erb" file, but I´m getting the following error:
undefined method 'each' for #
The #query variable is just an String. If you want to iterate over every single character on that string, you should use each_char method.
I really believe that you're iterating over the wrong variable. I think you want to iterate over the result of your query, not over your query characters! For that you should do something like:
<% #query_result = Request.connection.execute(#query) %>
<% #query_result.each do |c| %>
<%= label_tag(:credentials_id,c.credentials_id)%>
<%end%>
How do I place a link at the top of my page when the URL that it is pointing to is not determined until later down the page. In this example, I want to move Create and Edit Scenario links to the top of the page, but as you can see Edit Scenario depends on knowing the #scenario_id first.
<%= will_paginate #scens, :next_label => 'Older', :prev_label => 'Newer' %>
<div class="box">
<% for scenario in #scens %>
<% #created = scenario.created_at %>
<% #updated = scenario.updated_at %>
<% #scenario_id = scenario.id %>
<% if scenario.scenario_image.exists? %>
<%= scenario_image_tag(scenario) %>
<% end %>
<%= simple_format(scenario.description) %>
<% end %>
</div>
<% if session[:role_kind] == "controller" %>
<p>
<%= button_to "Create new scenario", :action => "create" %>
<% if #scens.size > 0 %>
<%= button_to "Edit scenario", :action => "edit", :id => #scenario_id %>
<% end %>
</p>
You can add the link at the top but you will need to programmatically access it later and then assign the URL to it. That needs some kind of reference or look-up capability, I'm thinking client-side javascript but that's as I don't know Ruby.
Alternatively you could create the link later when you have the URL and place the link at the top using CSS positioning. The actual position of all the DOM elements on the page need not match the order in which they are rendered.
One way to do this is to use a helper:
In your helper.rb file:
def stack_example(scens, &block)
html = 'Scenario Details'
edit_link = 'Edit Link'
yield html, edit_link
end
Then in your partial you could have something like:
<% stack_example(#scens) do |html, edit_link| %>
<%= edit_link %><br>
<%= html %>
<% end %>
Should output the following:
Edit Link
Scenario Details
I don't get it. Why do you create model in the view layer? Why wouldn't you create the model variables in the controller? Sth like:
class your_controller
def your_method
#scenario_id = ...
end
end
I think that your problem lays in the invalid MVC usage. Don't you think that all the #member #variables should be initialized before the view starts to render?