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Cannot delete or update a parent row: a foreign key constraint fails
...references. This:
ALTER TABLE `advertisers`
ADD CONSTRAINT `advertisers_ibfk_1` FOREIGN KEY (`advertiser_id`)
REFERENCES `jobs` (`advertiser_id`);
...is actually the opposite to what it should be. As it is, it means that you'd have to have a record in the jobs table before the advertis...
How can I cast int to enum?
...ags or enum values
.field public specialname rtspecialname int32 value__
}
What should get your attention here is that the value__ is stored separately from the enum values. In the case of the enum Foo above, the type of value__ is int16. This basically means that you can store whatever you w...
Difference between Destroy and Delete
... API:
ActiveRecord::Persistence.delete
Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen instance.
The row is simply removed with an SQL DELETE statement on the record's primary key, a...
How can I convert immutable.Map to mutable.Map in Scala?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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MongoDB/Mongoose querying at a specific date?
...l moments in a day.
db.posts.find( //query today up to tonight
{"created_on": {"$gte": new Date(2012, 7, 14), "$lt": new Date(2012, 7, 15)}})
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ActiveRecord: size vs count
...ve built but haven't saved, .count will report only the count from the database.
– Shawn J. Goff
Sep 6 '13 at 18:54
...
What is the Sign Off feature in Git for?
...ship information is not sufficient. I might have written a patch, but if I based it on some code from Unix, I wouldn't have permission to release it under the GPL (at least without signoff from someone higher up). Or, a patch may make it between several different maintainers before winding up in the...
Implicit “Submit” after hitting Done on the keyboard at the last EditText
...s:
In your layout put/edit this:
<EditText
android:id="@+id/search_edit"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"
android:singleLine="true"
android:imeOptions="actionDone" />
In your activity put this (e. g. i...
Naming cookies - best practices [closed]
...
appname_meaningfulname
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How can I convert a series of images to a PDF from the command line on linux? [closed]
... what if page*.png does not sort the images in the way you want ? e.g. page_1.png, page_2.png ... page_10.png -> page_10 will appear before page_1
– vcarel
Jul 17 '13 at 0:29
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