knex-automigrate/dist/index/dialects/mysql.js

Table schema based database migration tool, built on top of the knex.js

"use strict";
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    if (k2 === undefined) k2 = k;
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    if (k2 === undefined) k2 = k;
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}));
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
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        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = parseMySqlSchema;
const helper = __importStar(require("../helper"));
async function parseMySqlSchema(knex, tableName) {
    const startsWithKeyPK = 'PRIMARY KEY';
    const startsWithKeyUK = 'UNIQUE KEY';
    const startsWithKeyKey = 'KEY';
    const startsWithKeyFk = 'CONSTRAINT';
    const startsWithKeyFulltextKey = 'FULLTEXT KEY';
    const startsWithKeys = [startsWithKeyPK, startsWithKeyUK, startsWithKeyKey, startsWithKeyFk, startsWithKeyFulltextKey];
    const raw = await knex.raw(`SHOW CREATE TABLE \`${tableName}\``);
    const schema = raw[0][0]['Create Table'].split('\n')
        .map((e) => e.trim())
        .filter((e) => startsWithKeys.some((k) => e.indexOf(k) === 0));
    const primaryKeys = [];
    const uniqueKeys = {};
    const indexKeys = {};
    const foreignKeys = {};
    schema.forEach((e) => {
        if (e.indexOf(startsWithKeyPK) === 0) {
            const keys = helper.multipleColumns(helper.innerBrackets(e));
            if (keys) {
                primaryKeys.push(keys);
            }
        }
        else if (e.indexOf(startsWithKeyUK) === 0) {
            const name = helper.firstQuoteValue(e);
            const keys = helper.multipleColumns(helper.innerBrackets(e));
            if (name && keys) {
                uniqueKeys[name] = keys;
            }
        }
        else if (e.indexOf(startsWithKeyKey) === 0) {
            const name = helper.firstQuoteValue(e);
            const keys = helper.multipleColumns(helper.innerBrackets(e));
            if (name && keys) {
                indexKeys[name] = keys;
            }
        }
        else if (e.indexOf(startsWithKeyFk) === 0) {
            const ref = e.split('REFERENCES');
            const name = helper.firstQuoteValue(ref[0]);
            const srcKeys = helper.multipleColumns(helper.innerBrackets(ref[0]));
            const destTable = helper.firstQuoteValue(ref[1]);
            const destKeys = helper.multipleColumns(helper.innerBrackets(ref[1]));
            if (name && srcKeys && destTable && destKeys) {
                foreignKeys[name] = {
                    key: srcKeys,
                    ref: {
                        table: destTable,
                        key: destKeys,
                    },
                };
            }
        }
        else if (e.indexOf(startsWithKeyFulltextKey) === 0) {
            const name = helper.firstQuoteValue(e);
            const keys = helper.multipleColumns(helper.innerBrackets(e));
            if (name && keys) {
                indexKeys[name] = keys;
            }
        }
    });
    Object.keys(foreignKeys).forEach((key) => {
        delete indexKeys[key];
    });
    return {
        pk: primaryKeys,
        uk: uniqueKeys,
        key: indexKeys,
        fk: foreignKeys,
    };
}
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