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How do I create multiple submit buttons for the same form in Rails?
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I wish I had found this answer the first time I had this same question. I'm glad I decided to look a little deeper this time. Great solution.
– rockusbacchus
Aug 23 '17 at 21:44
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Rails detect if request was AJAX
In my action I wish to only respond with processing if it was called from an AJAX request. How do I check?
5 Answers
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Validate uniqueness of multiple columns
Is there a rails-way way to validate that an actual record is unique and not just a column? For example, a friendship model / table should not be able to have multiple identical records like:
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Access parent URL from iframe
... the HTML for your iframe, get the parent url through javascript "at build time", and send it as a url GET parameter in the querystring of your src target, like so:
<script type="text/javascript">
url = parent.document.URL;
document.write('<iframe src="http://example.com/mydata/page.ph...
Using Git with an existing Xcode project
...ce Control > Pull in Xcode before you con commit other changes.
Now any time you make changes in Xcode, all you have to do is Commit and Push.
I learned this method mostly from here.
See also
The Basics of Git and GitHub
How to add a .gitignore file for Swift in Xcode
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NameError: name 'self' is not defined
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Default argument values are evaluated at function define-time, but self is an argument only available at function call time. Thus arguments in the argument list cannot refer each other.
It's a common pattern to default an argument to None and add a test for that in code:
def p(se...
What is the best way to conditionally apply a class?
...sses by basically mapping a model property to a class name and at the same time keep CSS classes out of Controller code.
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NoSql vs Relational database
...amp; Durability
Adherence to Strong Schema of data being written/read
Real time query management ( in case of data size < 10 Tera bytes )
Execution of complex queries involving join & group by clauses
We have to use RDBMS (SQL) and NoSQL (Not only SQL) depending on the business case & r...
How to prevent form resubmission when page is refreshed (F5 / CTRL+R)
...ly to process the submission data if its different from the data sent last time (which we store in the session var 'messageIdent'). Are you processing your form submission within the 'if messageIdents are different' clause (ie where 'do_your_thang()' is)?
– Moob
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Django Forms: if not valid, show form with error message
...rt" aria-label="Close">
<span aria-hidden="true">&times;</span>
</button>
</div>
{% endif %}
If you want to generalise it you can create a list_errors.html which you include in every form template. It handles form and formset errors:
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