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30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
14 lines
628 B
Ruby
14 lines
628 B
Ruby
# frozen_string_literal: true
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class FixCategoriesConstraint < ActiveRecord::Migration[4.2]
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def change
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remove_index :categories, name: 'index_categories_on_parent_category_id_and_name'
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# Remove any previous duplicates
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execute "DELETE FROM categories WHERE id IN (SELECT id FROM (SELECT id, row_number() over (partition BY parent_category_id, name ORDER BY id) AS rnum FROM categories) t WHERE t.rnum > 1)"
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# Create a proper index for two categories not to have the same parent
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execute "CREATE UNIQUE INDEX unique_index_categories_on_name ON categories (COALESCE(parent_category_id, -1), name)"
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end
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end
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