Donal McBreen
97bcdf1853
SQLite columns lengths are purely informational, so we'll enforce the limits via a concern that checks the lengths from the schema.
47 lines
1.3 KiB
Ruby
47 lines
1.3 KiB
Ruby
# Validates string and text column lengths to match MySQL limits.
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# SQLite doesn't enforce column limits, so we need validations to ensure
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# data portability between databases.
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#
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# Usage:
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# class Card < ApplicationRecord
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# include ColumnLimits
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# end
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#
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# This will automatically add length validations for all string and text
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# columns based on their defined limits in the database schema.
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#
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# MySQL VARCHAR limits are in characters, not bytes.
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# MySQL TEXT limits are in bytes.
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module ColumnLimits
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extend ActiveSupport::Concern
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included do
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validate :validate_column_limits
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end
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private
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def validate_column_limits
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self.class.columns.each do |column|
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next unless column.limit
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next unless %i[string text].include?(column.type)
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value = read_attribute(column.name)
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next if value.nil?
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next unless value.is_a?(String)
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if column.type == :string
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# VARCHAR limits are in characters
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if value.length > column.limit
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errors.add(column.name, "is too long (maximum is #{column.limit} characters)")
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end
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else
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# TEXT limits are in bytes
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if value.bytesize > column.limit
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errors.add(column.name, "is too long (maximum is #{column.limit} bytes)")
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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
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