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Laravel Check If Related Model Exists
...method calls through to an Eloquent query Builder, which is set up to only select the related objects. That Builder in turn passes unknown method calls through to its underlying query Builder.
This means you can use the exists() or count() methods directly from a relation object:
$model->relati...
ERROR 1452: Cannot add or update a child row: a foreign key constraint fails
... table. Following query would be helpful to fetch those non-matching rows:
SELECT child_table.*
FROM child_table
LEFT JOIN parent_table
ON parent_table.referenced_column = child_table.referencing_column
WHERE parent_table.referenced_column IS NULL
Now, you can generally do one (or more) of th...
Adding VirtualHost fails: Access Forbidden Error 403 (XAMPP) (Windows 7)
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This worked wonderfully for me as opposed to the selected answer. For some reason "Require all granted" by itself as that answer suggests didn't work as it instantly crashed XAMPP. But this answer worked with those between <directory> so thanks for the answer.
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Get url parameters from a string in .NET
...;', ';' }, StringSplitOptions.RemoveEmptyEntries)
.Select(parameter => parameter.Split(new[] { '=' }, StringSplitOptions.RemoveEmptyEntries))
.GroupBy(parts => parts[0],
parts => parts.Length > 2 ? string.Jo...
Re-open *scratch* buffer in Emacs?
...
M-x switch-to-buffer *scratch* RET
The *scratch* buffer is the buffer selected upon startup, and has the major mode Lisp Interaction. Note: the mode for the *scratch* buffer is controlled by the variable initial-major-mode.
In general you can create as many "scratch" buffers as you want, and ...
What are the advantages of Sublime Text over Notepad++ and vice-versa? [closed]
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Sublime Text 2 has some neat features like multi cursor input, multiple selections etc that will make you immensely productive.
Good number of plugins and themes, and also support for those of Textmate means you can do anything with Sublime Text 2. I have moved from Notepad++ to Sublime Text 2 o...
Queries vs. Filters
... user is doing a google type search then I would use a query? If they are selecting possible value from a drop down (eg, invoice count > 50) then this would be a filter?
– Jonesie
Jan 30 '13 at 20:25
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Array to String PHP?
...word
1 | Sports
2 | Festivals
3 | Classes
4 | Other
You would simply select the data from the table with SQL, rather than have a table that looks like:
id | word
1 | Sports|Festivals|Classes|Other
That's not how anybody designs a schema in a relational database, it totally defeats the purp...
How to uninstall a Windows Service when there is no executable for it left on the system?
...urite way of doing this is to use Sysinternals Autoruns application. Just select the service and press delete.
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retrieve links from web page using python and BeautifulSoup [closed]
...re anything not purely Python isn't allowed.
lxml.html also supports CSS3 selectors so this sort of thing is trivial.
An example with lxml and xpath would look like this:
import urllib
import lxml.html
connection = urllib.urlopen('http://www.nytimes.com')
dom = lxml.html.fromstring(connection.r...