Ruby on Rails

Thanks a lot!   :-)

2015년 7월 1일 수요일 오전 4시 53분 59초 UTC+9, Frederick Cheung 님의 말:

On Tuesday, June 30, 2015 at 8:43:48 PM UTC+1, Yoon-Ho Choi wrote:
> Hi~
>
>
> I have raspberry pi 2 and odroid c1 server. (arm v7)
> There's same trouble on rails 4.2.x(4.2.0~4.2.3)
> I can not connect rails server page. (there's no error)
> I could not find a log(blank file).
> I'm using rbenv. Already, I had tested ruby source compile, too.
>
>
> But There was not problem on rails 4.1.x


One of the changes in 4.2 was to change rails server to bind to localhost only by default - you can only connect to the server from the same machine. To restore the old behaviour you can pass the -b option eg

rails s -b 0.0.0.0 #listens on all interfaces

Or

rails s -b 192.168.1.124 #listen on that particular interface

Fred.

On Tuesday, June 30, 2015 at 8:43:48 PM UTC+1, Yoon-Ho Choi wrote:
> Hi~
>
>
> I have raspberry pi 2 and odroid c1 server. (arm v7)
> There's same trouble on rails 4.2.x(4.2.0~4.2.3)
> I can not connect rails server page. (there's no error)
> I could not find a log(blank file).
> I'm using rbenv. Already, I had tested ruby source compile, too.
>
>
> But There was not problem on rails 4.1.x


One of the changes in 4.2 was to change rails server to bind to localhost only by default - you can only connect to the server from the same machine. To restore the old behaviour you can pass the -b option eg

rails s -b 0.0.0.0 #listens on all interfaces

Or

rails s -b 192.168.1.124 #listen on that particular interface

Fred.

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On Tuesday, June 30, 2015 at 6:58:38 PM UTC+1, Jason Hsu, Ruby on High Speed Rails wrote:
> The code in question works, but Rails Best Practices docks me with a scope access warning.  The code in question is:
>
>   def show
>     # NOTE: rails_best practices recommends using scope access
>     redirect_to(root_path) unless current_user == User.find(params[:id])
>     @user = User.find(params[:id])
>   end
>
> How can I get this code to comply with the scope access standard?

I think you've slightly confused it. It's trying to warn you against doing

post = Post.find params[:id]
if post.user == current_user
...
end

Because it's better to do

current_user.posts.find(params[:id])

Which doesn't apply in your case because it's users you are fetching, not some collection that belongs to a user. I'm not sure why you're bothering with the id parameter at all - why not

@user = current_user
?

Fred

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Maybe take out the save from rankup and rankdown and save in the
controller?

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On 29 June 2015 at 21:27, Federicko <fedomain@gmail.com> wrote:
>> Hi All,
>
>
> I have moved everything over to the model as suggested. Check it out :p
>
> In the model, I created a Class method as well as the previous instance
> methods:
>
> class Article < ActiveRecord::Base
>
> def self.rank(id, rank)
> @this_article = find(id)
>
> if (rank == "up")
> @next_article = find_by(rank: @this_article.rank.to_i-1)
>
> @this_article.rankup
> @next_article.rankdown
> else
> @next_article = find_by(rank: @this_article.rank.to_i+1)
>
> @this_article.rankdown
> @next_article.rankup
> end
> end
>
> def rankup
> self.rank = self.rank - 1
> self.save
> end
>
> def rankdown
> self.rank = self.rank + 1
> self.save
> end
>
> end
>
> And now in my controller, I only have one action:
>
> def rank
> Article.rank(params[:id], params[:rank])
> redirect_to articles_path
> end

Rather than having a class method rank() I think it would be better to
have a member method then in the controller do something like
this_article = Article.find(params[:id])
this_article.rank( params[:rank] )

Also don't forget to allow for the fact that there might not be an
article with the given id, so perhaps
this_article.rank (params[:rank]) if this_article

Colin

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On 29 June 2015 at 18:54, William de Lima <perfectbluex@gmail.com> wrote:
> ..
> ActionView::Template::Error (undefined method `name' for nil:NilClass):
> 9: .pull-right
> 10: = submit_tag t('news.comment'), class: 'btn btn-primary'
> 11: .clearfix
> 12: - unless @item.comments.any?
> 13: #comment-composer= t('news.no_comments')
> 14: - else
> 15: - @comments.each do |comment|
> app/views/news/show.html.haml:12:in
> `_app_views_news_show_html_haml___3582658555150926440_64556152601540'

Is @item nil possibly?

Colin

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On 29 June 2015 at 19:42, Federicko <fedomain@gmail.com> wrote:
>> Hi Fred,
>
>
> I took your advice and tried to move the ranking logic over to the model.
> I've also consolidated the 2 actions.
>
> Here's what I got:
>
> In the controller:
>
> def rank
> @this_article = Article.find(params[:id])
>
> if (params[:rank] == 'up')
> @next_article = Article.find_by(rank: @this_article.rank.to_i-1)
>
> @this_article.rankup
> @next_article.rankdown
> else
> @next_article = Article.find_by(rank: @this_article.rank.to_i+1)
>
> @this_article.rankdown
> @next_article.rankup
> end
>
> @this_article.save
> @next_article.save
>
> redirect_to articles_path
> end
>
> In the view, I am passing in the query string rank to indicate whether we
> are ranking up or down.
>
> And in my model I added two new methods:
>
> def rankup
> self.rank = self.rank - 1
> end
>
> def rankdown
> self.rank = self.rank + 1
> end
>
> I've added the rank up / rank down as a method in the Article object.
> However, the key to my ranking logic is to first find the next record as I
> need to swap the ranking with the current record. So the code to finding the
> next record (either previous or next record depending on whether we are
> ranking up or down). This code can only reside in the controller as far as I
> can tell.

Why do you think you cannot move more to the model? Which bit of code
in particular cannot reside there?

Colin

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On Monday, June 29, 2015, Мурыгин Антон <mibus32@gmail.com> wrote:

Now this is my model

class Business < ActiveRecord::Base
  belongs_to :category, class_name: 'BusinessCategory', foreign_key: 'business_category_id'

  def category

    super || BusinessCategory.new(name: 'other')

  end

end

Why it keeps throwing 

super: no superclass method `category' for #<Business:0x000001023014b8>

? Am i missing something?

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On Jun 29, 2015, at 8:18 AM, Padmahas Bn <padmahas@gmail.com> wrote:

> Hello Elizabeth McGurty that worked!!! (with little modification)
>
> Unique id for each modal generated fine but when calling that modal the the link_to didn't worked for me.
>
> I had to change this
> <td><%= link_to 'Show', "data-toggle" => "modal", :class => 'btn btn-default', :id => designation_dict.dd_id %></td>
>
> To this:
> <td><%= render :partial => "show", :locals => {:designation_dict => designation_dict} %></td>
>
> <td><%= link_to 'Show', designation_dict, "data-target" => "#myModal_#{designation_dict.id}", "data-toggle" => "modal", :class => 'btn btn-default' %></td>

A quick tip for generating HTML ID attributes from Rails: there is a helper method named #dom_id. You use it like this: dom_id(designation_dict), and by default, you get [object classname]_[numerical id] as a string. It takes an optional prefix as the second argument, which gets prepended, so if you did dom_id(designation_dict, :edit), you would get edit_designation_dict_42 out of it. This comes in really handy when you are setting up an ID in a view, and then again in a UJS file or similar. You don't have to fiddle around with a lot string concatenation in two places that way.

Walter

>
> Working like a charm. Thank you a lot. I was searching for this from past 20 days.
>
> Thank you again.
>
> On Mon, Jun 29, 2015 at 12:27 AM, Elizabeth McGurty <emcgurty2@gmail.com> wrote:
> <td><%= render :partial => "show", :locals => {:designation_dict => designation_dict} %></td>
>
> In your locals you are sending designation_dict. Is there something in designation_dict that is unique to all the records? Hopefully an id...
>
> Do you have that unique field, let's call it dd_id?
>
> Now this is going to seem to be Ad nauseam, and Mr Law refers to id="MyModal", which I do not see, yet he is entirely correct. What I understand is that you have an each statement that is iteratively loading...A partial, and numerous link_to
>
> For later, however you need it as params or js elements, each of these elements must contain -- at some required element level -- a unique html id.
>
> Look at the changes I made to your partial:
>
> <div class="modal-body" id="modal-body_<%= designation_dict.dd_id %>">
> <div class="table-responsive" id="table-responsive_<%= designation_dict.dd_id %>">
> <table class="table table-striped table-show">
> <tr>
> <th>
> <strong>Designation code:</strong>
> </th>
> <td>
> <%= designation_dict.desig_code %>
> </td>
> </tr>
>
> <tr>
> <th>
> <strong>Designation description:</strong>
> </th>
> <td>
> <%= designation_dict.designation %>
> </td>
> </tr>
> </table>
> </div>
>
> Do you see now how you are generating unique html ids?
>
> <td><%= link_to 'Show', "data-toggle" => "modal", :class => 'btn btn-default', :id => designation_dict.dd_id %></td>
>
>
> Once you make these changes, and then View Page Source, you will see that a unique id has been generated.... Folks will probably offer more elegance solutions, but the spirit remains the same.
>
> Hope this helps...
>
> Liz
>
>
> On Monday, May 4, 2015 at 10:47:06 AM UTC-4, Padmahas Bn wrote:
> After following so many Stackoverflow and other related posts I was able to render modal (_show.html.erb) from inside index.html.erb. But the problem the parameter I'm sending is showing same id and other details for all show buttons.
>
> For instance if there are 5 different members listed in index.html.erb, when I press the corresponding show button, the same id and other details as the first member is showing for all members.
>
> index.html.erb
> <tbody>
> <% @designation_dicts.each do |designation_dict| %>
> <tr>
> <td><%= designation_dict.desig_code %></td>
> <td><%= designation_dict.designation %></td>
>
> <td><%= render :partial => "show", :locals => {:designation_dict => designation_dict} %></td>
> <td><%= link_to 'Show', "#myModal", "data-toggle" => "modal", :class => 'btn btn-default' %></td>
> <td><%= link_to 'Edit', edit_designation_dict_path(designation_dict), :class => 'btn btn-default' %> </td>
> <td><%= link_to 'Destroy', designation_dict, method: :delete, data: { confirm: 'Are you sure?' } , :style => 'color:#FFFFFF', :class => 'btn btn-danger' %></td>
> </tr>
> <% end %>
> </tbody>
>
> Part of the modal (_show.html.erb)
> <div class="modal-body"> <div class="table-responsive">
> <table class="table table-striped table-show">
> <tr>
> <th>
> <strong>Designation code:</strong>
> </th>
> <td>
> <%= designation_dict.desig_code %>
> </td>
> </tr>
>
> <tr>
> <th>
> <strong>Designation description:</strong>
> </th>
> <td>
> <%= designation_dict.designation %>
> </td>
> </tr>
> </table>
> </div>
>
> Thank you
>
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On Monday, June 29, 2015, Мурыгин Антон <mibus32@gmail.com> wrote:

class Business < ActiveRecord::Base
  belongs_to :category, class_name: 'BusinessCategory', foreign_key: 'business_category_id'

  def category

    super || BusinessCategory.new(name: 'other')

  end

end

Why it keeps throwing 

super: no superclass method `category' for #<Business:0x000001023014b8>

?