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Unique Key constraints for multiple columns in Entity Framework
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Unique indexes in EntityFramework Core:
First approach:
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<Entity>()
.HasIndex(p => new {p.FirstColumn , p.SecondColumn}).IsUnique();
}
The second approach to create Unique Constraints with EF ...
jQuery if checkbox is checked
...and suggesting that the absolute fastest recommendation would be to add an ID
– Tom Stickel
Sep 15 '15 at 23:01
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DROP IF EXISTS VS DROP?
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Just thought I'd mention that it would be a really good idea for one to use CASCADE within a transaction block (BEGIN ... COMMIT). This way it is clear how the database will be affected before potentially clobbering a bunch of data you may not have wanted to.
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How to Apply Corner Radius to LinearLayout
...Call it, for example, shape.xml
In shape.xml:
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<solid
android:color="#888888" >
</solid>
<stroke
android:width="2dp"
android:color="#C...
Can I apply a CSS style to an element name?
...the HTML is not very well labelled, in the sense that there are not enough id and class declarations to differentiate between elements.
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Notifier 通知扩展：功能强大的Android通知管理工具，支持通知通道、意图、...
... Notifier 通知扩展：功能强大的Android通知管理工具，支持通知通道、意图、闹钟和多种通知类型
Notifier 通知扩展
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Where are my postgres *.conf files?
...based authentication file
# (change requires restart)
#ident_file = 'ConfigDir/pg_ident.conf' # ident configuration file
# (change requires restart)
# If external_pid_file is not explicitly set, no extra PID file is written.
#external_pid_file = '(none)' ...
Column order manipulation using col-lg-push and col-lg-pull in Twitter Bootstrap 3
...rks nor how to correctly specify the setting. What I want to show is one grid, which is consisted of length 5, and the other length 5, and finally one length 2 grid.
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How to make a SPA SEO crawlable?
...I am using MVC with Webapi controllers, and Phantomjs on the server side, and Durandal on the client side with push-state enabled; I also use Breezejs for client-server data interaction, all of which I strongly recommend, but I'll try to give a general enough explanation that will also h...
Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
Consider this code:
4 Answers
4
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