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3 Cards in this Set
- Front
- Back
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Active Record maps tables to __, table rows to __, and table columns to __.
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tables to classes, table rows to objects, and table columns to object attributes.
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check for validation errors
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article.errors.any?
or article.errors.full_messages or article.errors.messages(:title) ... article.errors.size article.valid? |
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active record associations
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has_one, has_many, belongs_to, has_and_belongs_to_many
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