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Validate uniqueness of multiple columns
Is there a rails-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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Why do I want to avoid non-default constructors in fragments?
I am creating an app with Fragments and in one of them, I created a non-default constructor and got this warning:
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Is it possible to override the configuration of a plugin already defined for a profile in a parent P
In a POM parent file of my project, I have such a profile defining some configurations useful for this project (so that I can't get rid of this parent POM) :
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jQuery - checkbox enable/disable
I have a bunch of checkboxes like this. If the "Check Me" checkbox is checked, all the other 3 checkboxes should be enabled, else they should be disabled. How can I do this using jQuery?
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How does Junit @Rule work?
I want to write test cases for a bulk of code, I would like to know details of JUnit @Rule annotation feature, so that I can use it for writing test cases. Please provide some good answers or links, which give detailed description of its functionality through a simple example.
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How to query nested objects?
I have a problem when querying mongoDB with nested objects notation:
3 Answers
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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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