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Converting an array of objects to ActiveRecord::Relation
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How can I convert an Array of objects to an ActiveRecord::Relation? Preferably without doing...
XML Serialization - Disable rendering root element of array
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edited Jul 6 '16 at 10:45
answered Jan 5 '10 at 14:27
Ru...
How to return a 200 HTTP Status Code from ASP.NET MVC 3 controller
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edited May 15 '14 at 18:36
jcolebrand
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What's the result of += in C and C++?
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edited May 23 '17 at 11:46
Community♦
111 silver badge
answered May 18 '12 at 13:57
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Cannot deserialize the JSON array (e.g. [1,2,3]) into type ' ' because type requires JSON object (e.
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164
Your json string is wrapped within square brackets ([]), hence it is interpreted as array instea...
Rails where condition using NOT NIL
...h Rails 3:
Foo.includes(:bar).where("bars.id IS NOT NULL")
ActiveRecord 4.0 and above adds where.not so you can do this:
Foo.includes(:bar).where.not('bars.id' => nil)
Foo.includes(:bar).where.not(bars: { id: nil })
When working with scopes between tables, I prefer to leverage merge so that...
What is mattr_accessor in a Rails module?
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phil pirozhkov
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answered Oct 9 '08 at 1:49
AvdiAvdi
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why does DateTime.ToString(“dd/MM/yyyy”) give me dd-MM-yyyy?
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246
Slash is a date delimiter, so that will use the current culture date delimiter.
If you want to...
Memory footprint of Haskell data types
... instance of these constructors and shares it amongst all uses.
A word is 4 bytes on a 32-bit machine, and 8 bytes on a 64-bit machine.
So e.g.
data Uno = Uno a
data Due = Due a b
an Uno takes 2 words, and a Due takes 3.
The Int type is defined as
data Int = I# Int#
now, Int# takes one wor...
How to get last items of a list in Python?
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545
You can use negative integers with the slicing operator for that. Here's an example using the p...