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Add a reference column migration in Rails 4
...migration AddUserToUploads user:references
Which will create a migration file as:
class AddUserToUploads < ActiveRecord::Migration
def change
add_reference :uploads, :user, index: true
end
end
Then, run the migration using rake db:migrate.
This migration will take care of adding a ne...
Access is denied when attaching a database
...ount that I was using had full control NTFS permissions to the mdf and ldf files. However, it had those permissions through group membership (the Local Administrators group had permissions, and my account is a member of local admins). (I verified the permissions)
If I try to do the attach, connec...
Django: How to manage development and production settings?
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The DJANGO_SETTINGS_MODULE environment variable controls which settings file Django will load.
You therefore create separate configuration files for your respective environments (note that they can of course both import * from a separate, "shared settings" file), and use DJANGO_SETTINGS_MODULE ...
Get a list of URLs from a site [closed]
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Notably, since this returns a list of files, not URLs, this would only really work for sites that are collections of static HTML files. If the site has URL query parameters, server-side rewritten URLs, or any kind of include/require/etc. assembling of pages, thi...
How to put a UserControl into Visual Studio toolBox
...i moved the code into another project, create a dll, and reference the dll file, the custom control does not show up.
– Fandi Susanto
Dec 8 '14 at 9:18
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How to generate a core dump in Linux on a segmentation fault?
...u want, but in practice this shouldn't be necessary since the size of core files will probably never be an issue for you.
In tcsh, you'd type
limit coredumpsize unlimited
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Redefine tab as 4 spaces
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It depends on what you mean. Do you want actual tab characters in your file to appear 4 spaces wide, or by "tab" do you actually mean an indent, generated by pressing the tab key, which would result in the file literally containing (up to) 4 space characters for each "tab" you type?
Depending o...
MetadataException: Unable to load the specified metadata resource
...anged since last it worked - and I've tried regenerating a new model (edmx-file) from the underlying database with no change.
...
How to color the Git console?
... it adds the ui = auto entry to the [color] section in user's ~/.gitconfig file.
– Andris
Nov 12 '15 at 10:11
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What is the difference between buffer and cache memory in Linux?
...s. "Cached" is similar like "Buffers", only this time it caches pages from file reading.
quote from:
https://web.archive.org/web/20110207101856/http://www.linuxforums.org/articles/using-top-more-efficiently_89.html
shar...