31 lines
918 B
Go
31 lines
918 B
Go
package upgrades
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import (
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"database/sql"
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)
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func init() {
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upgrades[1] = upgrade{"Add ON DELETE CASCADE to message table", func(tx *sql.Tx, ctx context) error {
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if ctx.dialect == SQLite {
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// SQLite doesn't support constraint updates, but it isn't that careful with constraints anyway.
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return nil
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}
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res, _ := ctx.db.Query(`SELECT EXISTS(SELECT constraint_name FROM information_schema.table_constraints
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WHERE table_name='message' AND constraint_name='message_chat_jid_fkey')`)
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var exists bool
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_ = res.Scan(&exists)
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if exists {
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_, err := tx.Exec("ALTER TABLE message DROP CONSTRAINT IF EXISTS message_chat_jid_fkey")
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if err != nil {
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return err
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}
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_, err = tx.Exec(`ALTER TABLE message ADD CONSTRAINT message_chat_jid_fkey
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FOREIGN KEY (chat_jid, chat_receiver) REFERENCES portal(jid, receiver)
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ON DELETE CASCADE`)
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if err != nil {
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return err
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}
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}
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return nil
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}}
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}
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