Fix typo in validations documentation. Closes #7669. [ee]
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6301 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
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@ -452,10 +452,10 @@ def validates_acceptance_of(*attr_names)
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# === Warning
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# Validate the presence of the foreign key, not the instance variable itself.
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# Do this:
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# validate_presence_of :invoice_id
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# validates_presence_of :invoice_id
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#
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# Not this:
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# validate_presence_of :invoice
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# validates_presence_of :invoice
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#
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# If you validate the presence of the associated object, you will get
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# failures on saves when both the parent object and the child object are
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