Render a template inside wysiwyg text - ruby-on-rails

I have a #page.content that is stored in database as a text column. Is there an easy way to embed a render tag inside that html content?
<div>Lorem ipsum</div>
<%= render 'image_slider' %>
<div>Lorem ipsum</div>

I choose the nokogiri way and finished with two urly helpers
def print_content_start( page, shift=4 )
result = ''
doc = Nokogiri::HTML( page.content )
doc.css('div,p').each_with_index do |node, i|
break if i == shift
result += node.to_s
end
result
end
def print_content_end( page, shift=4 )
result = ''
doc = Nokogiri::HTML( page.content )
doc.css('div,p').drop( shift ).each do |node|
result += node.to_s
end
result
end
If anyone knows a better way, please let me know!

Related

How do I display database calls from Controller into view, to be viewed in HTML

I was handed a project from someone else, it's in Ruby On Rails, which I know VERY LITTLE. Basically, there is an EXPORT button, that the user clicks to send data to a CSV. I am tasked with sending this data to the view to be seen in HTML. (Thinking I could use dataTables). I have tried following examples, such as:
#example = StudentGroup.where(survey_id: #survey.id).order("groupNum")
and then using <%= #example %> in the view just to see the data and I get nothing. (Also extremely new to MySQL). I'll post the method, if ANYONE can help me, I'd very much appreciate it.
def download_results
if (user_signed_in?)
else
redirect_to new_user_session_path
end
#survey = Survey.find(params[:survey_to_view])
filename = #survey.name + " - " + Date.today.to_formatted_s(:short)
require "csv"
CSV.open(#survey.name+".csv", "wb") do |csv|
csv << [filename]
StudentGroup.where(survey_id: #survey.id).order("groupNum")
csv << []
csv << ["Summarized Results"]
csv << ["UCA","Group Number","Criteria 1","Criteria 2","Criteria 3","Criteria 4","Criteria 5","Criteria 6","Criteria 7","Criteria 8","Overall Team Contribution","Average(Would Work With Again)","Average(C1..C8)","Overall Team Contribution MINUS Average(C1..C9)"]
questions = #survey.questions
numQuestions = 0
questions.each do |q|
if(q.question_type != 2 && q.question_type != 4)
numQuestions = numQuestions+1
end
end
groups.each do |g|
answersCount = Answer.where(student_group_id: g.id).count
if(answersCount == numQuestions && answersCount != 0)
othersInGroup = StudentGroup.where(groupNum: g.groupNum, survey_id: #survey.id).order("groupNum")
size = othersInGroup.count-1
arr = []
criteria = SurveyQuestionDatum.where("number > 24 AND number < 35")
multiAvg = 0
teamCont = 0
criteria.each do |c|
avg = 0
othersInGroup.each do |o|
a = Answer.where(survey_question_datum_id: c.id, student_group_id: o.id).first
if(o.uca != g.uca)
if(a.nil?)
size = size-1
else
avg = avg + a.answer[g.uca].to_i
end
end
end
avg = avg.to_f/size
if(c.number == 33)
teamCont = avg
end
if(c.number < 33)
multiAvg = multiAvg+avg
end
arr << avg
end
multiAvg = multiAvg.to_f/8
arr << multiAvg
arr << teamCont-multiAvg
arr.insert(0,g.uca, g.groupNum)
csv << arr
end
end
csv << []
csv << []
csv << ["Raw Student Answers"]
groups = StudentGroup.where(survey_id: #survey.id).order("groupNum")
size = groups.count
csv << ["UCA", "F-Number", "Group Number"]
groups.each do |g|
answersCount = Answer.where(student_group_id: g.id).count
if(answersCount == numQuestions && answersCount != 0)
othersInGroup = StudentGroup.where(groupNum: g.groupNum, survey_id: #survey.id).order("groupNum")
csv << []
csv << [g.uca, g.FNum, g.groupNum]
answers = Answer.where(student_group_id: g.id)
csv << ["Question Number", "Question", "Answer"]
answers.each do |a|
datum = a.survey_question_datum
question = datum.question
#question_types = {"0" => "short", "1" => "paragraph",
#2" => "title", "3" => "fivept", "4" => "fixed",
#5" =>"ranking", "6"=>"tenpoints","7"=>"hundredpoints"}
ansText = ""
if(question.question_type == 0)
ansText = a.answer
elsif (question.question_type == 1)
if(question.rule == 'perMember')
othersInGroup.each do |o|
ansText = ansText+"#{o.uca},#{a.answer[o.uca]},"
end
elsif(question.rule == 'default')
ansText = a.answer
end
else (question.question_type == 3)
othersInGroup.each do |o|
ansText = ansText+"#{o.uca},#{a.answer[o.uca]},"
end
end
ansText = ansText.chomp(',')
ansText = ansText.split(',')
ansText.insert(0,datum.number,question.question_text)
csv << ansText
end
end
end
end
send_file(#survey.name+".csv", :filename => filename+".csv")
end
You need a new controller action. Take a look at http://guides.rubyonrails.org/layouts_and_rendering.html
Create an index (or show, or whatever you want to call it, maybe example) action. Make sure it is in your routes.
http://guides.rubyonrails.org/getting_started.html#adding-a-route-for-comments
do not use the download_results code.
set your #example variable the way you were trying to do.
create a view for your index action
add the data to your index view.
If you put code in your download_results method (action) it will never get rendered because of the send_file method call.
Did you create a brand new controller / action / view? Did you use generators? Have you really practiced doing this setup exactly the way the examples, videos, tutorials say to do it? If you have, you have seen how all the pieces (models, controllers, actions, views) come together. You should have seen how render statements come into play. Do that, exactly as the tutorials say to do it and you will get the idea.
If you want to use the same content that the download action uses, refactor the code to extract a method that is used both actions.
This is related to respond_to part, check the docs.
send_file(#survey.name+".csv", :filename => filename+".csv")
Your code above simply means you click the button, the controller will respond you with a csv file. So, if you want a html, the controller should be able to respond to html as well.

Rspec, Rails - how to test helper method that use params hash?

I want to implement a tagging system similar to stackoverflow, there is a box with a tags at top right corner, and also I have links to delete tag from params hash. my method works correctly in browser. But I can't find a way to test it.
def tags_list_with_destroy_links
if params[:tags]
li = ""
p = params[:tags].split("+") # '/tagged/sea+ship+sun' => ['sea', 'ship', 'sun']
p.map do |t|
remove_link = if p.count >= 3
c = p.reject {|item| item == t }
a = c.join("+")
{:tags => a}
elsif p.count == 2
c = p.reject {|item| item == t }
{tags: c[0]}
else
questions_url
end
li << content_tag(:li) do
link_to(t, questions_tags_path(t), class: 'tag') +
link_to( '', remove_link , class: 'icon-small icons-cross')
end
end
ul = content_tag(:ul, li.html_safe)
ul << tag(:hr)
end
end
I've tried:
it 'return list with selected tags' do
#Rails.application.routes.url_helpers.stub(:questions_tags).and_return('/questions/tagged/sea+ship+sun')
#helper.request.stub(:path).and_return('/questions/tagged/sea+ship+sun')
helper.stub(:url_for, {controller:'questions', action: 'index', tags:'sea+ship+sun'} ).and_return('/questions/tagged/sea+ship+sun')
helper.params[:tags] = 'sea+ship+sun'
helper.tags_list_with_destroy_links.should == 'list_with_tags'
end
but it return:
<a class=\"tag\" href=\"/questions/tagged/sea+ship+sun\">sea</a><a class=\"icon-small icons-cross\" href=\"/questions/tagged/sea+ship+sun\"></a></li>
and shoud return remove link as
href="/questions/tagged/ship+sun" without sea
I would appreciate any advice
The params field is going to come back parsed into the correct ruby data structures (hash, array, string, etc). There's no need to manually split items such as +, if there is a nested param it will return as part of the params object:
{tags: ["sea", "ship", "sun"]}
To access your data, or create an assumption about your param data existing in the test, you're going to want to create a stub. You're almost there, try something more along the lines of:
helper.stub!(:params).and_return({tags: ["sea", "ship", "sun"]})
Once you have the params stubbed correctly you can check the output of your helper method to ensure it's validity (this is called the expectation):
expect(helper.tags_list_with_destroy_links).to eq("some_url")

Write simple rails code better

I'm newbie on rails.
In my form I get string like "123, xxx_new item, 132, xxx_test "
if the item start with "xxx_" than its mean that i should add the item to the db otherwise enter the value
this is my code and i sure that there is a better way to write this code
tags = params[:station][:tag_ids].split(",")
params[:station][:tag_ids] = []
tags.each do |tag|
if tag[0,4] =="xxx_"
params[:station][:tag_ids] << Tag.create(:name => tag.gsub('xxx_', '')).id
else
params[:station][:tag_ids]<< tag
end
end
I'm looking for how to improve my code syntax
What about:
tags = params[:station][:tag_ids].split(',')
params[:station][:tag_ids] = tags.each_with_object([]) do |tag, array|
array << tag.start_with?('xxx_') ? Tag.create(name: tag[4..-1]).id : tag
end

Generate table of contents like on Wikipedia, without JavaScript

I have a page that is formatted like so:
<h1>Header</h1>
<h2>Subheader</h2>
<h3>Subsubheader</h3>
<h1>Another header</h1>
Is it possible to server-side generate a table of contents / outline at the start of the page, like Wikipedia does in its articles? I use Ruby on Rails.
EDIT: WITHOUT JavaScript!
I created a class for this purpose today. It depends on http://www.nokogiri.org/, but that gem comes with Rails already.
Put this in app/models/toc.rb:
class Toc
attr_accessor :html
TOC_CLASS = "toc".freeze
TOC_ELEMENT = "p".freeze
TOC_ITEMS = "h1 | h2 | h3 | h4 | h5".freeze
UNIQUEABLE_ELEMENTS = "h1 | h2 | h3 | h4 | h5 | p".freeze
def initialize(content)
#html = Nokogiri::HTML.fragment content
end
def generate
clear
set_uniq_ids
toc = create_container
html.xpath(TOC_ITEMS).each { |node| toc << toc_item_tag(node) }
html.prepend_child toc
return html.to_s
end
private
def clear
html.search(".#{TOC_CLASS}").remove
end
def set_uniq_ids
html.xpath(UNIQUEABLE_ELEMENTS).
each { |node| node["id"] = rand_id }
end
def rand_id
(0...8).map { ('a'..'z').to_a[rand(26)] }.join
end
def create_container
toc = Nokogiri::XML::Node.new TOC_ELEMENT, html
toc["class"] = TOC_CLASS
return toc
end
def toc_item_tag(node)
"<a data-turbolinks='false' class=\"toc-link toc-link-#{node.name}\" href=\"##{node["id"]}\">#{node.text}</a>"
end
end
Use it like
toc = Toc.new article.body
body_with_toc = toc.generate
article.update body: body_with_toc
You need to generate data source from your hierarchy to be something like this
#toc = [ ['header', 0], ['subheader', 1], ['subsubheader', 2],
['header2', 0], ['header3', 0], ['subheader2', 1]
]
Than it is easy to render it in template, for example:
<%- #toc.each do |item, distance| %>
<%= (' ' * distance * 5).html_safe %>
<%= item %>
<br/>
<%- end %>
Would give you:
header
subheader
subsubheader
header2
header3
subheader2
Of course you can use 'distance' for determining style size instead of 'depth', but I hope you get the main idea.
yes, it is possible. you don't really need rails for this; you can also use javascript to generate a table of contents.
Here is an exmaple library that you can use.
http://www.kryogenix.org/code/browser/generated-toc/
You could alternatively create your anchor links as you loop through elements in your rails erb/haml views.

conditional statement in ruby

I am trying to write Helper method in rails but its throwing error for following line
#if button_source.kind_of?(Array) then list = button_source else list = button_source.sort
The complete code
def buttons(model_name, target_property, button_source)
html = ''
list = ''
if button_source.kind_of?(Array) then list = button_source else list = button_source.sort end
list = button_source.sort
list.each do|x|
html << radio_button(model_name, target_property, x[1])
html << h(x[0])
html << '<br />'
end
return html
end
Please help me to resolve this issue, thanks.
You're missing an end at the end of the if statement.

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