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How to determine if a record is just created or updated in after_save
The #new_record? function determines if a record has been saved. But it is always false in the after_save hook. Is there a way to determine whether the record is a newly created record or an old one from update?
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Combine two ActiveRecord::Relation objects
Suppose I have the following two objects:
8 Answers
8
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How to create ASP.NET Web API Url?
In ASP.NET MVC, we have @Url.Action for actions. Is there something similar like @Url.Api which would route to /api/controller?
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When use getOne and findOne methods Spring Data JPA
I have an use case where it calls the following:
7 Answers
7
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ERROR: permission denied for sequence cities_id_seq using Postgres
I'm new at postgres (and at database info systems all in all). I ran following sql script on my database:
4 Answers
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SCOPE_IDENTITY() for GUIDs?
Can anyone tell me if there is an equivalent of SCOPE_IDENTITY() when using GUIDs as a primary key in SQL Server?
5 Answe...
How to transfer some data to another Fragment?
...er some data to another Fragment likewise it was done with extras for intents ?
10 Answers
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Find object in list that has attribute equal to some value (that meets any condition)
I've got list of objects. I want to find one (first or whatever) object in this list that has attribute (or method result - whatever) equal to value .
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How to obtain a Thread id in Python?
I have a multi-threading Python program, and a utility function, writeLog(message) , that writes out a timestamp followed by the message. Unfortunately, the resultant log file gives no indication of which thread is generating which message.
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Facebook database design?
...ures a composite primary key made up of the two foreign
keys, both pointing back to the user table. One ID will point to the
logged in user, the other ID will point to the individual friend
of that user)
Example Usage:
Table User
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UserID EmailAddress Password Gender ...