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# frozen-string-literal: true
module Sequel
module Plugins
# The error_splitter plugin automatically splits errors entries related to
# multiple columns to have separate error entries, one per column. For example,
# a multiple column uniqueness entry:
#
# validates_unique([:artist_id, :name])
#
# would by default result in errors entries such as:
#
# {[:artist_id, :name]=>'is already taken'}
#
# This plugin transforms those errors into:
#
# {:artist_id=>'is already taken', :name=>'is already taken'}
#
# The main reason to split errors is if you have a list of fields that you
# are checking for validation errors. If you don't split the errors, then:
#
# errors.on(:artist_id)
#
# would not return the uniqueness error.
#
# Usage:
#
# # Make all model subclass instances split errors (called before loading subclasses)
# Sequel::Model.plugin :error_splitter
#
# # Make the Album class split errors
# Album.plugin :error_splitter
module ErrorSplitter
module InstanceMethods
private
# If the model instance is not valid, split the errors before returning.
def _valid?(opts)
v = super
unless v
split_validation_errors(errors)
end
v
end
# Go through all of the errors entries. For any that apply to multiple columns,
# remove them and add separate error entries, one per column.
def split_validation_errors(errors)
errors.keys.select{|k| k.is_a?(Array)}.each do |ks|
msgs = errors.delete(ks)
ks.each do |k|
msgs.each do |msg|
errors.add(k, msg)
end
end
end
end
end
end
end
end
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