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SQL - many-to-many table primary key
...er. The surrogate is a waste of space.
You won't need indexes on the individual columns since the table should only ever be used to join the two referenced tables together.
That comment you refer to in the question is not worth the electrons it uses, in my opinion. It sounds like the author thinks...
Can a dictionary be passed to django models on create?
... Thanks, that is exactly what I was looking to do. Also, as a side note just based off your post. You don't have to call the save method when using Model.objects.create(**data_dict). You probably already know this but just a heads up.
– clarence
Oct...
Call AngularJS from legacy code
...
Interop from outside of angular to angular is same as debugging angular application or integrating with third party library.
For any DOM element you can do this:
angular.element(domElement).scope() to get the current scope for the element
...
Mongodb Explain for Aggregation framework
...rations
explain:true
db.collection.aggregate([
{ $project : { "Tags._id" : 1 }},
{ $unwind : "$Tags" },
{ $match: {$or: [{"Tags._id":"tag1"},{"Tags._id":"tag2"}]}},
{ $group: {
_id : "$_id",
count: { $sum:1 }
}},
{$sort: {"count":-1}}
],
{
explain:...
Reference list item by index within Django template?
...ave an array in which I'm not sure of the index of my desired value {% for id in article_details.heading.contents.article_ids %} {% if id.type == 'DOI' %} {{ article_details.heading.contents.article_ids.forloop.counter0.value }} {% endif %} {% endfor %}
–...
Rails filtering array of objects by attribute value
...
As @Vik's solution is pretty much ideal, I'll just add that in binary cases, you could use a 'partition' function to make things sweet. ruby-doc.org/core-1.9.3/Enumerable.html#method-i-partition
– Vlad
Jun 20 '16 at 21:...
How do I get an element to scroll into view, using jQuery?
I have an HTML document with images in a grid format using <ul><li><img... . The browser window has both vertical & horizontal scrolling.
...
How can I get zoom functionality for images?
...me as
ImageView. Example:
TouchImageView img = (TouchImageView) findViewById(R.id.img);
If you are using TouchImageView in xml, then you must provide the full package
name, because it is a custom view. Example:
<com.example.touch.TouchImageView
android:id="@+id/img”
android:layout_w...
Prevent segue in prepareForSegue method?
...nd later:
You have to implement the method
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
In your view controller. You do your validation there, and if it's OK then return YES; if it's not then return NO; and the prepareForSegue is not called.
Note that this ...
MySQL Cannot drop index needed in a foreign key constraint
...the index: ALTER TABLE mytable ADD CONSTRAINT mytable_ibfk_1 FOREIGN KEY (AID) REFERENCES mytable_a (ID) ON DELETE CASCADE;
– laffuste
Feb 11 '14 at 7:49
8
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