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Open Cygwin at a specific folder
...nload it again and start setup again to run an update), make sure that you select the chere package under the "Shells" category.
After Cygwin is launched, open up a Cygwin terminal (as an administrator) and type the command: chere -i -t mintty -s bash.
Now you should have "Bash Prompt Here" in the...
What is the difference between CascadeType.REMOVE and orphanRemoval in JPA?
... and remove the post entity:
Post post = entityManager.createQuery("""
select p
from Post p
join fetch p.comments
where p.id = :id
""", Post.class)
.setParameter("id", postId)
.getSingleResult();
entityManager.remove(post);
Hibernate is going to execute three delete statements:...
Django migration strategy for renaming a model and relationship fields
...ll ask you for
Did you rename the appname.oldName model to NewName? [y/N] select Y
Run python manage.py migrate and it will ask you for
The following content types are stale and need to be deleted:
appname | oldName
appname | NewName
Any objects related to these content types by a foreign key...
Drawing an image from a data URL to a canvas
...
in javascript , using jquery for canvas id selection :
var Canvas2 = $("#canvas2")[0];
var Context2 = Canvas2.getContext("2d");
var image = new Image();
image.src = "images/eye.jpg";
Context2.drawImage(image, 0, 0);
html5:
<canv...
How do I make a checkbox required on an ASP.NET form?
... ClientValidationFunction="CheckBoxRequired_ClientValidate">You must select this box to proceed.</asp:CustomValidator>
and finally, in your postback - whether from a button or whatever...
if (Page.IsValid)
{
// your code here...
}
...
How to clear all s’ contents inside a parent ?
...t was asked for in the original question -- you should use a more specific selector.
– Drew Noakes
Aug 10 '11 at 10:48
4
...
django test app error - Got an error creating the test database: permission denied to create databas
...@localhost; I originally tried to only GRANT CREATE... but then could not SELECT or DROP the created database. This essentially makes your user a superuser, so be careful.
– mightypile
Dec 31 '15 at 16:28
...
How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?
...ction table
Example queries:
-- Getting all students for a class:
SELECT s.student_id, last_name
FROM student_classes sc
INNER JOIN students s ON s.student_id = sc.student_id
WHERE sc.class_id = X
-- Getting all classes for a student:
SELECT c.class_id, name
FROM s...
Google maps API V3 - multiple markers on exact same spot
...t to be written) function to popup an InfoWindow with a list of options to select from. Note that the markerClusterer object is passed to your function, because you will need this to determine how many markers there are in that cluster. For example:
function multiChoice(mc) {
var cluster = mc....
How to configure PostgreSQL to accept all incoming connections
...s you have to reload the configuration. One way to do this is execute this SELECT as a superuser.
SELECT pg_reload_conf();
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