Ruby on Rails – Page 6 – What I Broke – Programming and Web Development

Truncating a String within a View – Ruby on Rails

Another quick post, just on how to truncate a string within a view. I used the following in order to ensure that my order_item title is never longer than 100 characters:

Title:  100, :seperator => ' ...') %>

This will output the title, if it’s longer than 100 characters the string will be shortened to 100 characters (minus the separator’s length). The neat thing about truncate is all the separator functionality is built in – you don’t have to throw any if/else logic in to check whether it’s required or not.

Output:

#Less than 100 characters
Title: lentesque porttitor

#More than 100 characters
Title: lentesque porttitor, velit vel ullamcorper pharetra, augue erat pharetra risus, quis bibendum fel…

Good Luck!

Adding a Link Within a Flash Notice/Message – Ruby on Rails

I came across an instance where I needed to add a link to flash notice tonight. Manually creating a hyperlink seems to work fine, however I was chasing a rubyish way of doing things:

flash[:notice] = "Order created - Click here to pay for it!"

Luckily a quick Google revealed the answer:

flash[:notice] = "Order created - Click here to pay for it!".html_safe

If you’re using rails 3 make sure you throw in the .html_safe or your link will be appear as plain text. Just a quick screenshot of the end result below:

Anyway, that’s all. Good Luck!

Passing Variables to a Partial from a View – Ruby on Rails

Just another one of those things that I find myself needing to do from time to time. Luckily this is all pretty straight forward (thankyou Ruby on Rails!). Assuming your partial is a form in the locations folder and that the variable you’re expecting is location all that you have to do is following:

View: users/show.html.erb

 'locations/form', :locals => { :location => @user.location } %>

Partial: locations/_form.html.erb


Street:

Good luck!

Error 324 (net::ERR_EMPTY_RESPONSE) – Ruby on Rails

I managed to break my app again while playing around with the routes and a few redirects:

No data received
Unable to load the webpage because the server sent no data.
Here are some suggestions:
Reload this webpage later.
Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection without sending any data.

This wasn’t one I had encountered before and unfortunately Google couldn’t give me anything to cheat off. Luckily, a quick review of the server log revealed the following message just before it closed the connection:

[2011-12-03 21:09:05] ERROR URI::InvalidURIError: the scheme http does not accept registry part: 192.168.1.3:3000locations (or bad hostname?)

From this error message it became clear that I needed to place a forward slash before my redirect path:

#Redirect to edit location path      
redirect_to '/locations/edit'

Hopefully this’ll be able to help someone else out there, Good Luck!

Custom Form Submit Button Text – Ruby on Rails

Just a quick post on how to set the text of a form submit button. By default, the tag will appear as follows:

In order to change the text all you have to do is the following, where ‘Set Location’ is your new text:

Good Luck!

Validation Error Messages not Displaying – Ruby on Rails

Just another quick problem I ran into, the validation was indicating that an error had occurred however it did not show what the error was:

1 error prohibited this message from being saved:

— Usually an error would appear here —

Turns out the problem was pretty straight forward – it’s always the little things! I’d simply missed the each when displaying the error messages:


  
    
        prohibited this message from being saved:

Simply adding the correct code fixed the problem straight away.

1 error prohibited this message from being saved:

Country can’t be blank

Good Luck!