method
changes_from_nil_to_empty_string?
Ruby on Rails latest stable (v7.1.3.2)
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Class: ActiveRecord::AttributeMethods::Dirty
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changes_from_nil_to_empty_string?(column, old, value)
private
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# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 109 def changes_from_nil_to_empty_string?(column, old, value) # For nullable numeric columns, NULL gets stored in database for blank (i.e. '') values. # Hence we don't record it as a change if the value changes from nil to ''. # If an old value of 0 is set to '' we want this to get changed to nil as otherwise it'll # be typecast back to 0 (''.to_i => 0) column.null && (old.nil? || old == 0) && value.blank? end