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How to persist a property of type List in JPA?
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Sorry to revive an old thread but should anyone be looking for an alternative solution where you store your string lists as one field in your database, here's how I solved that. Create a Converter like this:
import java.util.Arrays;
import java.util.List;
import javax.persistence.A...
Django ManyToMany filter()
... style filters in the many-to-many and many-to-one tests. Here is syntax for your specific problem:
users_in_1zone = User.objects.filter(zones__id=<id1>)
# same thing but using in
users_in_1zone = User.objects.filter(zones__in=[<id1>])
# filtering on a few zones, by id
users_in_zones...
How to become an OpenCart guru? [closed]
...ms like they have no documentation except some api calls on their official forums. I have experience with Zend framework and CodeIgniter framework. Can any OpenCart masters recommend me the best way to learn it and master in shortest amount of time? I have to do a big project with it soon.
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How do you do a limit query in JPQL or HQL?
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This was posted on the Hibernate forum a few years back when asked about why this worked in Hibernate 2 but not in Hibernate 3:
Limit was never a supported clause
in HQL. You are meant to use
setMaxResults().
So if it worked in Hibernate 2, it seem...
SQL Update with row_number()
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you can massively improve future update performance with a WHERE clause (see my answer based on this)
– Simon_Weaver
Dec 28 '16 at 7:46
add a c...
Is there a way to iterate over a slice in reverse in Go?
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No there is no convenient operator for this to add to the range one in place. You'll have to do a normal for loop counting down:
s := []int{5, 4, 3, 2, 1}
for i := len(s)-1; i >= 0; i-- {
fmt.Println(s[i])
}
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When to use .First and when to use .FirstOrDefault with LINQ?
...heck whether there was an element or not. In other words, when it is legal for the sequence to be empty. You should not rely on exception handling for the check. (It is bad practice and might hurt performance).
Finally, the difference between First() and Take(1) is that First() returns the element ...
How do I handle ImeOptions' done button click?
...bove code would some times activate the callback twice. Instead I've opted for the following code, which I got from the Google chat clients:
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
// If triggered by an enter key, this is the event; otherwise, this is null.
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How to serialize SqlAlchemy result to JSON?
...s some good automatic serialization of ORM models returned from DB to JSON format.
26 Answers
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Combine two ActiveRecord::Relation objects
...irst_name_relation.or(last_name_relation)
† Only in ActiveRecord 5+; for 4.2 install the where-or backport.
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