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How do you delete an ActiveRecord object?
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user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent association options.
User.delete_all(condition:...
IntelliJ shortcut to show a popup of methods in a class that can be searched
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Use Navigate (View in older versions) | File Structure Popup (Ctrl+F12 on Windows, ⌘+F12 on OS X). Start typing method/symbol name to either narrow down the list or highlight the desired element. Press Enter to navigate to the selected element.
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Can an Option in a Select tag carry multiple values?
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One way to do this, first one an array, 2nd an object:
<select name="">
<option value='{"num_sequence":[0,1,2,3]}'>Option one</option>
<option value='{"foo":"bar","one":"two"}'>Option two</option>
</select&g...
How to expand folded package chain in Intellij IDEA?
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2 Answers
2
Active
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postgresql return 0 if returned value is null
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182
use coalesce
COALESCE(value [, ...])
The COALESCE function returns the first of its argument...
Add directives from directive in AngularJS
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260
In cases where you have multiple directives on a single DOM element and where the
order in whi...
SQL (MySQL) vs NoSQL (CouchDB) [closed]
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edited Feb 20 '15 at 21:05
community wiki
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How to modify a text file?
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edited Oct 9 '12 at 12:11
user229044♦
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HTML/Javascript change div content
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SyntacticSyntactic
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