Ruby on Rails/ActiveRecord
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[edit] ActiveRecord - The Model
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- See the way the models are named and what names to avoid
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- How to get your data inside the database in a convenient way
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- Connect different models together
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- Read about how to manipulate your data at certain states of their existence
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- Check your input for their correctness
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- How to look up different criteria without writing SQL
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- Write advanced aggregations inside your model
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- Do basic mathematical calculations with your data
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- Extend functionality with acts_as
