44 lines
1.2 KiB
Ruby
44 lines
1.2 KiB
Ruby
require 'active_record/scoping/default'
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require 'active_record/scoping/named'
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module ActiveRecord
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# This class is used to create a table that keeps track of values and keys such
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# as which environment migrations were run in.
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class InternalMetadata < ActiveRecord::Base # :nodoc:
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class << self
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def primary_key
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"key"
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end
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def table_name
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"#{table_name_prefix}#{ActiveRecord::Base.internal_metadata_table_name}#{table_name_suffix}"
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end
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def []=(key, value)
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find_or_initialize_by(key: key).update_attributes!(value: value)
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end
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def [](key)
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where(key: key).pluck(:value).first
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end
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def table_exists?
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ActiveSupport::Deprecation.silence { connection.table_exists?(table_name) }
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end
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# Creates an internal metadata table with columns +key+ and +value+
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def create_table
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unless table_exists?
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key_options = connection.internal_string_options_for_primary_key
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connection.create_table(table_name, id: false) do |t|
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t.string :key, key_options
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t.string :value
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t.timestamps
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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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end
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