39 lines
2.4 KiB
Ruby
39 lines
2.4 KiB
Ruby
module ActiveModel
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module Validations
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module ClassMethods
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# Validates whether the value of the specified attribute is of the correct form by matching it against the regular expression
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# provided.
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#
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# class Person < ActiveRecord::Base
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# validates_format_of :email, :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i, :on => :create
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# end
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#
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# Note: use <tt>\A</tt> and <tt>\Z</tt> to match the start and end of the string, <tt>^</tt> and <tt>$</tt> match the start/end of a line.
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#
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# A regular expression must be provided or else an exception will be raised.
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#
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# Configuration options:
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# * <tt>:message</tt> - A custom error message (default is: "is invalid")
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# * <tt>:allow_nil</tt> - If set to +true+, skips this validation if the attribute is +nil+ (default is: +false+)
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# * <tt>:allow_blank</tt> - If set to +true+, skips this validation if the attribute is blank (default is: +false+)
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# * <tt>:with</tt> - The regular expression used to validate the format with (note: must be supplied!)
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# * <tt>:on</tt> - Specifies when this validation is active (default is <tt>:save</tt>, other options <tt>:create</tt>, <tt>:update</tt>)
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# * <tt>:if</tt> - Specifies a method, proc or string to call to determine if the validation should
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# occur (e.g. <tt>:if => :allow_validation</tt>, or <tt>:if => Proc.new { |user| user.signup_step > 2 }</tt>). The
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# method, proc or string should return or evaluate to a true or false value.
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# * <tt>:unless</tt> - Specifies a method, proc or string to call to determine if the validation should
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# not occur (e.g. <tt>:unless => :skip_validation</tt>, or <tt>:unless => Proc.new { |user| user.signup_step <= 2 }</tt>). The
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# method, proc or string should return or evaluate to a true or false value.
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def validates_format_of(*attr_names)
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configuration = { :message => ActiveRecord::Errors.default_error_messages[:invalid], :on => :save, :with => nil }
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configuration.update(attr_names.extract_options!)
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raise(ArgumentError, "A regular expression must be supplied as the :with option of the configuration hash") unless configuration[:with].is_a?(Regexp)
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validates_each(attr_names, configuration) do |record, attr_name, value|
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record.errors.add(attr_name, configuration[:message]) unless value.to_s =~ configuration[:with]
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end
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end
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end
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end
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end |