2ce4af84e9
Some database systems can make better use of an index if the index columns are ordered left-to-right in increasing specificity. I'm not sure if Postgres is one of those databases, but it also makes sense to me to read an index as "ordered by type and then ID".
12 lines
296 B
Ruby
12 lines
296 B
Ruby
class CreateGlitchNotes < ActiveRecord::Migration[5.1]
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def change
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create_table :glitch_notes do |t|
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t.bigint :target_id, null: false
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t.string :target_type, null: false
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t.text :note, null: false
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t.index [:target_type, :target_id]
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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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