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module StripLeadingAndTrailingDot
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extend ActiveSupport::Concern
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# Strips leading and trailing dots from attributes
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#
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# using <tt>StripLeadingAndTrailingDot</tt> to strip the leading and trailing dots in +Domain+:
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#
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# class Domain
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# include StripLeadingAndTrailingDot
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#
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# def dot_strip_attrs
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# ['name']
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# end
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# end
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#
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# Saving a +Domain+ with the name <tt>'.foo.'</tt> saves it as <tt>'foo'</tt>
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included do
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before_validation :strip_dots
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end
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def strip_dots
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self.changes.each do |column, values|
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# return string if RuntimeError: can't modify frozen String
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if values.last.is_a?(String) && dot_strip_attrs.include?(column)
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self.send("#{column}=", values.last.gsub(/(^\.|\.$)/, '')) if respond_to?("#{column}=")
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end
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end
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end
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# default empty array - overwrite in each model for specific string fields that should have dots removed
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def dot_strip_attrs
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[]
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end
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end
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