25 lines
881 B
JavaScript
25 lines
881 B
JavaScript
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const debug = require('debug')('knex-migrator:use-index');
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/**
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* @description Private helper to migrate the migrations table. It will add missing indexes to existing fields.
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* @returns {*}
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*/
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module.exports.up = function (connection) {
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debug('Ensure Unique Index.');
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return connection.schema.hasTable('migrations')
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.then(function (exists) {
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if (exists) {
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return connection.schema.alterTable('migrations', function (table) {
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table.unique(['name', 'version']);
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}).catch(function () {
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// @NOTE: ignore for now, it's not a urgent, required change
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// e.g. index exists already (1061,1)
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// e.g. can't index because of already existing duplicates
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return Promise.resolve();
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});
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}
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});
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};
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