mirror of https://github.com/getmango/Mango.git
95 lines
2.0 KiB
Crystal
95 lines
2.0 KiB
Crystal
class UnavailableIDs < MG::Base
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def up : String
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<<-SQL
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-- add unavailable column to ids
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ALTER TABLE ids ADD COLUMN unavailable INTEGER NOT NULL DEFAULT 0;
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-- add unavailable column to titles
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ALTER TABLE titles ADD COLUMN unavailable INTEGER NOT NULL DEFAULT 0;
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SQL
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end
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def down : String
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<<-SQL
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-- remove unavailable column from ids
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ALTER TABLE ids RENAME TO tmp;
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CREATE TABLE ids (
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path TEXT NOT NULL,
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id TEXT NOT NULL,
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signature TEXT
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);
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INSERT INTO ids
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SELECT path, id, signature
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FROM tmp;
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DROP TABLE tmp;
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-- recreate the indices
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CREATE UNIQUE INDEX path_idx ON ids (path);
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CREATE UNIQUE INDEX id_idx ON ids (id);
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-- recreate the foreign key constraint on thumbnails
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ALTER TABLE thumbnails RENAME TO tmp;
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CREATE TABLE thumbnails (
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id TEXT NOT NULL,
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data BLOB NOT NULL,
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filename TEXT NOT NULL,
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mime TEXT NOT NULL,
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size INTEGER NOT NULL,
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FOREIGN KEY (id) REFERENCES ids (id)
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ON UPDATE CASCADE
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ON DELETE CASCADE
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);
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INSERT INTO thumbnails
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SELECT * FROM tmp;
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DROP TABLE tmp;
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CREATE UNIQUE INDEX tn_index ON thumbnails (id);
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-- remove unavailable column from titles
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ALTER TABLE titles RENAME TO tmp;
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CREATE TABLE titles (
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id TEXT NOT NULL,
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path TEXT NOT NULL,
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signature TEXT
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);
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INSERT INTO titles
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SELECT path, id, signature
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FROM tmp;
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DROP TABLE tmp;
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-- recreate the indices
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CREATE UNIQUE INDEX titles_id_idx on titles (id);
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CREATE UNIQUE INDEX titles_path_idx on titles (path);
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-- recreate the foreign key constraint on tags
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ALTER TABLE tags RENAME TO tmp;
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CREATE TABLE tags (
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id TEXT NOT NULL,
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tag TEXT NOT NULL,
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UNIQUE (id, tag),
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FOREIGN KEY (id) REFERENCES titles (id)
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ON UPDATE CASCADE
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ON DELETE CASCADE
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);
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INSERT INTO tags
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SELECT * FROM tmp;
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DROP TABLE tmp;
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CREATE INDEX tags_id_idx ON tags (id);
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CREATE INDEX tags_tag_idx ON tags (tag);
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SQL
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end
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end
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