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294 lines
7.2 KiB
TypeScript
294 lines
7.2 KiB
TypeScript
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// Loaded from https://raw.githubusercontent.com/denjucks/dex/master/lib/schema/tablebuilder.js
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// TableBuilder
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// Takes the function passed to the "createTable" or "table/editTable"
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// functions and calls it with the "TableBuilder" as both the context and
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// the first argument. Inside this function we can specify what happens to the
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// method, pushing everything we want to do onto the "allStatements" array,
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// which is then compiled into sql.
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// ------
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import _ from '../deps/lodash@4.17.15/index.js';
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const each = _.each;
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const extend = _.extend;
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const isFunction = _.isFunction;
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const isString = _.isString;
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const toArray = _.toArray;
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import helpers from '../helpers.js';
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function TableBuilder(client, method, tableName, fn) {
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this.client = client;
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this._fn = fn;
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this._method = method;
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this._schemaName = undefined;
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this._tableName = tableName;
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this._statements = [];
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this._single = {};
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if (!isFunction(this._fn)) {
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throw new TypeError(
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'A callback function must be supplied to calls against `.createTable` ' +
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'and `.table`'
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);
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}
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}
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TableBuilder.prototype.setSchema = function (schemaName) {
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this._schemaName = schemaName;
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};
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// Convert the current tableBuilder object "toSQL"
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// giving us additional methods if we're altering
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// rather than creating the table.
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TableBuilder.prototype.toSQL = function () {
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if (this._method === 'alter') {
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extend(this, AlterMethods);
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}
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this._fn.call(this, this);
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return this.client.tableCompiler(this).toSQL();
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};
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each(
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[
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// Each of the index methods can be called individually, with the
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// column name to be used, e.g. table.unique('column').
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'index',
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'primary',
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'unique',
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// Key specific
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'dropPrimary',
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'dropUnique',
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'dropIndex',
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'dropForeign',
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],
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function (method) {
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TableBuilder.prototype[method] = function () {
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this._statements.push({
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grouping: 'alterTable',
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method,
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args: toArray(arguments),
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});
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return this;
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};
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}
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);
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// Warn for dialect-specific table methods, since that's the
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// only time these are supported.
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const specialMethods = {
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mysql: ['engine', 'charset', 'collate'],
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postgresql: ['inherits'],
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};
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each(specialMethods, function (methods, dialect) {
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methods.forEach(function (method) {
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TableBuilder.prototype[method] = function (value) {
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if (this.client.dialect !== dialect) {
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throw new Error(
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`Knex only supports ${method} statement with ${dialect}.`
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);
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}
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if (this._method === 'alter') {
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throw new Error(
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`Knex does not support altering the ${method} outside of create ` +
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`table, please use knex.raw statement.`
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);
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}
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this._single[method] = value;
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};
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});
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});
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helpers.addQueryContext(TableBuilder);
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// Each of the column types that we can add, we create a new ColumnBuilder
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// instance and push it onto the statements array.
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const columnTypes = [
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// Numeric
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'tinyint',
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'smallint',
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'mediumint',
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'int',
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'bigint',
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'decimal',
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'float',
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'double',
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'real',
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'bit',
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'boolean',
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'serial',
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// Date / Time
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'date',
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'datetime',
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'timestamp',
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'time',
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'year',
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// String
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'char',
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'varchar',
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'tinytext',
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'tinyText',
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'text',
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'mediumtext',
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'mediumText',
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'longtext',
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'longText',
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'binary',
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'varbinary',
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'tinyblob',
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'tinyBlob',
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'mediumblob',
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'mediumBlob',
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'blob',
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'longblob',
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'longBlob',
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'enum',
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'set',
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// Increments, Aliases, and Additional
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'bool',
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'dateTime',
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'increments',
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'bigincrements',
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'bigIncrements',
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'integer',
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'biginteger',
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'bigInteger',
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'string',
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'json',
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'jsonb',
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'uuid',
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'enu',
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'specificType',
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];
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// For each of the column methods, create a new "ColumnBuilder" interface,
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// push it onto the "allStatements" stack, and then return the interface,
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// with which we can add indexes, etc.
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each(columnTypes, function (type) {
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TableBuilder.prototype[type] = function () {
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const args = toArray(arguments);
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const builder = this.client.columnBuilder(this, type, args);
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this._statements.push({
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grouping: 'columns',
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builder,
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});
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return builder;
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};
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});
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// The "timestamps" call is really just sets the `created_at` and `updated_at` columns.
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TableBuilder.prototype.timestamps = function timestamps() {
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const method = arguments[0] === true ? 'timestamp' : 'datetime';
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const createdAt = this[method]('created_at');
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const updatedAt = this[method]('updated_at');
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if (arguments[1] === true) {
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const now = this.client.raw('CURRENT_TIMESTAMP');
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createdAt.notNullable().defaultTo(now);
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updatedAt.notNullable().defaultTo(now);
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}
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return;
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};
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// Set the comment value for a table, they're only allowed to be called
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// once per table.
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TableBuilder.prototype.comment = function (value) {
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if (typeof value !== 'string') {
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throw new TypeError('Table comment must be string');
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}
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this._single.comment = value;
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};
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// Set a foreign key on the table, calling
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// `table.foreign('column_name').references('column').on('table').onDelete()...
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// Also called from the ColumnBuilder context when chaining.
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TableBuilder.prototype.foreign = function (column, keyName) {
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const foreignData = { column: column, keyName: keyName };
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this._statements.push({
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grouping: 'alterTable',
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method: 'foreign',
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args: [foreignData],
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});
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let returnObj = {
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references(tableColumn) {
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let pieces;
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if (isString(tableColumn)) {
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pieces = tableColumn.split('.');
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}
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if (!pieces || pieces.length === 1) {
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foreignData.references = pieces ? pieces[0] : tableColumn;
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return {
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on(tableName) {
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if (typeof tableName !== 'string') {
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throw new TypeError(
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`Expected tableName to be a string, got: ${typeof tableName}`
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);
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}
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foreignData.inTable = tableName;
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return returnObj;
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},
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inTable() {
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return this.on.apply(this, arguments);
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},
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};
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}
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foreignData.inTable = pieces[0];
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foreignData.references = pieces[1];
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return returnObj;
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},
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withKeyName(keyName) {
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foreignData.keyName = keyName;
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return returnObj;
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},
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onUpdate(statement) {
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foreignData.onUpdate = statement;
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return returnObj;
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},
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onDelete(statement) {
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foreignData.onDelete = statement;
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return returnObj;
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},
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_columnBuilder(builder) {
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extend(builder, returnObj);
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returnObj = builder;
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return builder;
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},
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};
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return returnObj;
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};
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const AlterMethods = {
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// Renames the current column `from` the current
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// TODO: this.column(from).rename(to)
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renameColumn(from, to) {
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this._statements.push({
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grouping: 'alterTable',
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method: 'renameColumn',
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args: [from, to],
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});
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return this;
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},
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dropTimestamps() {
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return this.dropColumns(['created_at', 'updated_at']);
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},
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// TODO: changeType
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};
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// Drop a column from the current table.
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// TODO: Enable this.column(columnName).drop();
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AlterMethods.dropColumn = AlterMethods.dropColumns = function () {
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this._statements.push({
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grouping: 'alterTable',
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method: 'dropColumn',
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args: toArray(arguments),
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});
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return this;
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};
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export default TableBuilder;
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