This is my code
%ul.thumbnails
%li.span3
%header
%h2
= link_to t('homepage.house.link'), houses_path
I have a variable #country.name. How can I add/concatenate this variable to t('homepage.house.link')?
I'm not sure how t() works. What about:
= link_to t("homepage.house.link" + #country.name), houses_path
If you just want the link name change you can do:
= link_to t("homepage.house.link") + #country.name, houses_path
Or string interpolate the entire line:
= link_to "#{t('homepage.house.link')} #{#country.name}", houses_path
Related
I'm trying to string interpolate in a message model.
I want to combine a string 'message' and a select media_url into a :body so I can text a text message that contains both a message and a link concatenated. Any help with the interpolation would be appreciated.
I'm trying to do a before_create to grab two fields and combine them into a 3rd field that's saved as body.
My current result yields:
MESSAGE#{#message.media_url}
message.rb
before_create do
self.body = 'MESSAGE' + '#{#message.media_url}'
end
new.html.erb
<%= f.text_field :body, :value => "body" ,:class => 'form-control ' %>
<%= f.select :media_url, Url.order('name asc').all.collect { |u| [u.name, (u.sanitized_url + u.short_url)] }, { class: 'form-control' } %>
It is suppose to output something like... Message and www.google.com/EdRds which is the value coming from the select box.
Thank you
You got the MESSAGE#{#message.media_url} result, because you're wrapping your #{} in single quotes '', that must be between double quotes.
You could try just interpolating, not concatenating:
before_create do
# Not an instance variable, the media_url attribute from the object itself
self.body = "MESSAGE #{self.media_url}"
end
Because '#{#message.media_url}' won't work as a interpolation, that must be with double quotes "", and 'MESSAGE' + is concatenating the #message.media_url value, so you could wrap all in double quotes and your variable value in {}.
I'm trying to create a search form in my rails application. I've looked up various solutions but they make little sense to me.
I'm getting the following error when I run a search through a form in my rails app. Right now my concern (other than the error) is my instance variable #computers in my index action. I'm pretty sure it's not 'the rails way' to get a search done properly and would love some advice.
Error
undefined method `%' for #<Array:0x5780460>
Parameters after Search
http://localhost:3000/computers?utf8=%E2%9C%93&direction=&sort=&search=bob
Search Form
<%= form_tag computers_path, method: "get" do %>
<%= hidden_field_tag :direction, params[:direction] %>
<%= hidden_field_tag :sort, params[:sort] %>
<%= text_field_tag :search, params[:search] %>
<%= submit_tag "Go", name: nil, class: "btn btn-primary" %>
<% end %>
Call to Method
def index
#computers = Computer.where(school_id: current_user.school_id).search(params[:search]).category(params[:category]).order(sort_column + " " + sort_direction)
end
Method
def Computer.search(search)
if search
search = search.downcase
params = []
values = {}
column_names.each do |c|
params << "#{c} LIKE #{c.to_sym}"
values[c.to_sym] = search
end
params.join (' OR ')
where(params,values)
else
all
end
end
You've got the right idea, but invoking the .join method does not change the object on which it is called, it merely returns a string representation. You need to store the return in a variable, something like this: paramsStr = params.join(' OR '). Then simply pass paramsStr to the where clause.
Ultimately, that is what is causing your unidentified method % for Array .... error; this version of the where method is expecting the first parameter to be a string. Check out this documentation, the part about placeholder conditions.
Hope that helps.
Here is my simple rails 3 code :
<%= link_to "link", gateway_index_url(developer:#item.developer.api_key, tracker:"email", url:#product.url) %>
And the result is :
<a href="/gateway?developer=abcde&tracker=email&url=http%3A%2F%2Fwww.bla.fr%2FproductA" >link</a>
The problem is that & are rewritten in &. I can't figure how to prevent escaping, as :escape => false doesn't exist in Rails 3
Update: So here's the source
def link_to(*args, &block)
if block_given?
options = args.first || {}
html_options = args.second
link_to(capture(&block), options, html_options)
else
name = args[0]
options = args[1] || {}
html_options = args[2]
html_options = convert_options_to_data_attributes(options, html_options)
url = url_for(options)
href = html_options['href']
tag_options = tag_options(html_options)
href_attr = "href=\"#{ERB::Util.html_escape(url)}\"" unless href
"<a #{href_attr}#{tag_options}>#{ERB::Util.html_escape(name || url)}</a>".html_safe
end
end
As we can see, from the source, this behavior is by design.
You can try one of two solutions, I haven't tried them but they should work
1.) Try placing the call to gateway inside of a call to #raw:
<%= link_to "link", raw(gateway_index_url(developer: #item.developer.api_key, tracker:"email", url:#product.url)) %>
That may solve your specific problem, an the second approach, while a bit more brute-force should also work...
2.) If you want to convert it (the whole href) back you can... use CGI::unescape_html:
<%= CGI::unescape_html(link_to "link", gateway_index_url(developer: #item.developer.api_key, tracker:"email", url:#product.url)) %>
Good luck, hopefully this helps.
Update 2: Fixed call to cgi unescape, was using "." when it should be "::" and formatting fix. Forgot to indent example for #1
Rory O'Kane is spot on. The answer to "Why are ampersands escaped when generating url with link_to?" is that is the correct way to separate params in a url.
Is there a problem with the url the way it is?
If so, could you elaborate on the problem?
You may be able to prevent escaping the url by using raw on the entire url like so:
<%= link_to "link", raw(gateway_index_url(developer:#item.developer.api_key, tracker:"email", url:#product.url)) %>
I am using Meta-search Gem to search from table by below controller action. I am Using The Rails version 3.2.9.
class FeedEntriesController < ApplicationController
def index
#search = FeedEntry.search(params[:is_star])
#feed_entries = #search.page(params[:page])
#app_keys = AppKey.all
end
end
feed_entries table contain is_star:boolean attribute. So, I just want to pass the hash parameter is_star == true into the params[:is_star] from view using form_for or link_to . I tried using the below way.
In Views/feed_entries/index.html.erb
<%= link_to "Stared", {:controller => "feed_entries", :action => "index", :is_star => true }%>
but the above way is now worked, So I decided to make use of form_for in the below way,
<%= form_for(#is_star) do |f|%>
<%= f.hidden_field :is_star_is_true %>
<%= f.submit "Search" %>
<% end %>
But, nothing is worked, please someone help me resolve this problem.
true and false when passed as a string is parsed as their truthy value when used in a boolean column. This is also true for 0, 1, '0' and '1'
>> m = Model.new
>> m.active = 'false'
>> m.active? # false
>> m.active = 'true'
>> m.active? # true
Knowing this, you can pass 'true' as the value of the hidden_field
<%= f.hidden_field :is_start, value: 'true' %>
You can pass in the value of the parent in the view where the form is being rendere ultimately with something like <%=params[:is_start] = 1 %> . I am not sure how the layout of the app is setup. Also make sure to attr_accessible :is_start
Update: I may have understood your problem wrong. So try this as well
<%= f.hidden_field :is_star, value: 'true' %>
Or you could have a radio button ?
<%= f.radio_button :is_star, value: 'true' %>
I'm sure there is a better way to do this, but in my inexperience, I'm having trouble sorting that better way out. I have a link that needs to send and object to controller for processing. It isn't working properly:
views/home/index.html.erb
<% search_term = "pizza" %>
<% #tag = Tag.find(:all, :conditions => ["name = ?", search_term ]).first %>
<li> <%= link_to(search_term, {:controller => "restaurants", :action => "index", :search_item => #tag}) %> </li>
controllers/restaurants.rb
def index
search_tag = params[:search_item]
#restaurants = Restaurant.search_by_tag(search_tag)
models/restaurant.rb
Class Restauarant < ActiveRecord::Base
def self.search_by_tag(search_tag)
search_condition = search_tag.name
#tags = Tag.find(:all, :conditions => [" name = ?", search_condition ])
#tag = #tags.first
#Restaurants = #tag.restaurants
end
end
This causes a NoMethodError in ResataurantsController#index
parameters:
{"searchitem" => "15"}
For some reason, the tag object isn't being passed properly from the home/index.html.erb and is only passing along the Tag-object :id to the restaurants controller. Isn't possible to pass a full object this way. what am I doing wrong?
You can't submit an object through get params like that. Typically, you'll just pass the object's id (which you are already doing), and then do a lookup in the controller:
#tag = Tag.find(params[:search_item])
It would make more sense to rename the "search_item" param to "tag_id".