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What is `related_name` used for in Django?
...his data
you only can use related name
bom = material.tomaterial.all().order_by('-creation_time')
It is not working otherwise (at least I was not able to skip the usage of related name in case of 2 FK's to the same table.)
...
Getters \ setters for dummies
...examples, the internal property names are abstracted with an underscore in order to discourage users from simply doing foo.bar vs. foo.get( 'bar' ) and getting an "uncooked" value. You can use conditional code to do different things depending on the name of the property being accessed (via the name ...
How do you check “if not null” with Eloquent?
...on - ".....\vendor\laravel\framework\src\Illuminate\Database\Query\Builder.php"
– Atiqur
Oct 2 '16 at 5:05
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Regex - Should hyphens be escaped? [duplicate]
...er in the range (e.g. [-a-z] or [0-9-]), OR escape it (e.g. [a-z\-0-9]) in order to add "hyphen" to your class.
It's more common to find a hyphen placed first or last within a character class, but by no means will you be lynched by hordes of furious neckbeards for choosing to escape it instead.
(A...
Beginner's guide to ElasticSearch [closed]
...e a good degree of separation of data that belongs within the same index.
PHP
I use PHP as a front end and used this wrapper to integrate my ELS installation into my scripts.
Other resources
The presentation in the other answer to your question is really good, go through it and learn the DSL Que...
Escaping ampersand in URL
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there is a php function urlencode which solves this problem : usage $escapedfilename=urlencode($filename);
– Jeremy Young
Feb 19 '19 at 13:28
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How can I send an HTTP POST request to a server from Excel using VBA?
...wser of Bill the Lizard:
Most of the backends parse the raw post data. In PHP for example, you will have an array $_POST in which individual variables within the post data will be stored. In this case you have to use an additional header "Content-type: application/x-www-form-urlencoded":
Set objHT...
How do you use the ellipsis slicing syntax in Python?
... a = arange(16).reshape(2,2,2,2)
Now, you have a 4-dimensional matrix of order 2x2x2x2. To select all first elements in the 4th dimension, you can use the ellipsis notation
>>> a[..., 0].flatten()
array([ 0, 2, 4, 6, 8, 10, 12, 14])
which is equivalent to
>>> a[:,:,:,0].f...
Inversion of Control vs Dependency Injection
...constructors/setters/service lookups, which the object will 'depend' on in order to behave correctly.
IoC without using DI, for example would be the Template pattern because the implementation can only be changed through sub-classing.
DI Frameworks are designed to make use of DI and can define int...
Swift - Convert to absolute value
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With Swift 5, you may use one of the two following ways in order to convert an integer to its absolute value.
#1. Get absolute value of an Int from magnitude property
Int has a magnitude property. magnitude has the following declaration:
var magnitude: UInt { get }
For any ...