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# frozen_string_literal: true
module DataMigrate
##
# Provides the definition method for data_schema.rb
class Data < ActiveRecord::Schema
# This method is based on the following two methods
# ActiveRecord::Schema#define
# ActiveRecord::ConnectionAdapters::SchemaStatements
# #assume_migrated_upto_version
def define(info)
DataMigrate::DataMigrator.assure_data_schema_table
return if info[:version].blank?
version = info[:version].to_i
unless migrated.include?(version)
execute "INSERT INTO #{sm_table} (version) VALUES ('#{version}')"
end
insert(version)
end
private
def migrated
@migrated ||= select_values("SELECT version FROM #{sm_table}").map(&:to_i)
end
def versions
@versions ||= begin
versions = []
Dir.foreach(DataMigrate::DataMigrator.full_migrations_path) do |file|
match_data = DataMigrate::DataMigrator.match(file)
versions << match_data[1].to_i if match_data
end
versions
end
end
def insert(version)
inserted = Set.new
(versions - migrated).each do |v|
if inserted.include?(v)
raise "Duplicate data migration #{v}. Please renumber your data " \
"migrations to resolve the conflict."
elsif v < version
execute "INSERT INTO #{sm_table} (version) VALUES ('#{v}')"
inserted << v
end
end
end
def sm_table
quote_table_name(table_name)
end
def table_name
DataMigrate::DataSchemaMigration.table_name
end
end
end
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