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Validate uniqueness of multiple columns
...ils-way way to validate that an actual record is unique and not just a column? For example, a friendship model / table should not be able to have multiple identical records like:
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Difference between database and schema
What's the difference between a Database and a Schema in SQL Server? Both are the containers of tables and data.
5 Answers
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Removing a model in rails (reverse of “rails g model Title…”)
How can I completely remove this model? Thanks
5 Answers
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How to check for Is not Null And Is not Empty string in SQL server?
How can we check in a SQL Server WHERE condition whether the column is not null and not the empty string ( '' )?
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Java unchecked: unchecked generic array creation for varargs parameter
I have set Netbeans to show unchecked warnings in my Java code, but I am failing to understand the error on the following lines:
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vim “modifiable” is off
... file with nerd tree. I hit the a key to create a new file and i get the message:
7 Answers
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How does Activity.finish() work in Android?
Could someone provide a description of what happens when an Activity calls its finish() method?
4 Answers
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How do you get AngularJS to bind to the title attribute of an A tag?
The intent is to have a product name appear in the tooltip of a thumbnail.
Browsers do not create a tooltip from "ng-title" or "ng-attr-title."
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What's the difference between @Secured and @PreAuthorize in spring security 3?
It's not clear for me what is the difference in spring security between :
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What's the difference between CENTER_INSIDE and FIT_CENTER scale types?
I can't tell the difference between ImageView.ScaleType.CENTER_INSIDE and ImageView.ScaleType.FIT_CENTER .
3 Answers
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