Restrict deletion of adjustment reasons if adjustments present #6303
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Summary
This adds a
dependent: :restrict_with_error
to thehas_many
association betweenspree_adjustments
andspree_adjustment_reasons
. It also adds a corresponding foreign key constraint.If the foreign key constraint fails, the developer gets a suggestion to
nil
theadjustment_reason_id
column in thespree_adjustments
table for those records that have an adjustment reason ID with not corresponding adjustment reason. We don't want to delete adjustment records.Extracted from #6240
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