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182 lines
5.5 KiB
TypeScript
182 lines
5.5 KiB
TypeScript
// Loaded from https://raw.githubusercontent.com/denjucks/dex/master/lib/schema/columncompiler.js
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// Column Compiler
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// Used for designating column definitions
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// during the table "create" / "alter" statements.
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// -------
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import Raw from '../raw.js';
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import helpers from './helpers.js';
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import _ from '../deps/lodash@4.17.15/index.js';
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const groupBy = _.groupBy;
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const first = _.first;
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const has = _.has;
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const isObject = _.isObject;
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const tail = _.tail;
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function ColumnCompiler(client, tableCompiler, columnBuilder) {
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this.client = client;
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this.tableCompiler = tableCompiler;
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this.columnBuilder = columnBuilder;
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this._commonBuilder = this.columnBuilder;
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this.args = columnBuilder._args;
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this.type = columnBuilder._type.toLowerCase();
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this.grouped = groupBy(columnBuilder._statements, 'grouping');
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this.modified = columnBuilder._modifiers;
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this.isIncrements = this.type.indexOf('increments') !== -1;
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this.formatter = client.formatter(columnBuilder);
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this.sequence = [];
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this.modifiers = [];
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}
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ColumnCompiler.prototype.pushQuery = helpers.pushQuery;
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ColumnCompiler.prototype.pushAdditional = helpers.pushAdditional;
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ColumnCompiler.prototype.unshiftQuery = helpers.unshiftQuery;
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ColumnCompiler.prototype._defaultMap = {
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columnName: function () {
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if (!this.isIncrements) {
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throw new Error(
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`You did not specify a column name for the ${this.type} column.`
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);
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}
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return 'id';
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},
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};
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ColumnCompiler.prototype.defaults = function (label) {
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if (Object.prototype.hasOwnProperty.call(this._defaultMap, label)) {
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return this._defaultMap[label].bind(this)();
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} else {
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throw new Error(
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`There is no default for the specified identifier ${label}`
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);
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}
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};
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// To convert to sql, we first go through and build the
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// column as it would be in the insert statement
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ColumnCompiler.prototype.toSQL = function () {
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this.pushQuery(this.compileColumn());
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if (this.sequence.additional) {
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this.sequence = this.sequence.concat(this.sequence.additional);
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}
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return this.sequence;
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};
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// Compiles a column.
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ColumnCompiler.prototype.compileColumn = function () {
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return (
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this.formatter.wrap(this.getColumnName()) +
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' ' +
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this.getColumnType() +
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this.getModifiers()
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);
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};
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// Assumes the autoincrementing key is named `id` if not otherwise specified.
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ColumnCompiler.prototype.getColumnName = function () {
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const value = first(this.args);
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return value || this.defaults('columnName');
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};
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ColumnCompiler.prototype.getColumnType = function () {
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const type = this[this.type];
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return typeof type === 'function' ? type.apply(this, tail(this.args)) : type;
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};
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ColumnCompiler.prototype.getModifiers = function () {
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const modifiers = [];
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for (let i = 0, l = this.modifiers.length; i < l; i++) {
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const modifier = this.modifiers[i];
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//Cannot allow 'nullable' modifiers on increments types
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if (!this.isIncrements || (this.isIncrements && modifier === 'comment')) {
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if (has(this.modified, modifier)) {
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const val = this[modifier].apply(this, this.modified[modifier]);
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if (val) modifiers.push(val);
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}
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}
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}
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return modifiers.length > 0 ? ` ${modifiers.join(' ')}` : '';
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};
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// Types
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// ------
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ColumnCompiler.prototype.increments =
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'integer not null primary key autoincrement';
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ColumnCompiler.prototype.bigincrements =
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'integer not null primary key autoincrement';
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ColumnCompiler.prototype.integer = ColumnCompiler.prototype.smallint = ColumnCompiler.prototype.mediumint =
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'integer';
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ColumnCompiler.prototype.biginteger = 'bigint';
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ColumnCompiler.prototype.varchar = function (length) {
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return `varchar(${this._num(length, 255)})`;
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};
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ColumnCompiler.prototype.text = 'text';
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ColumnCompiler.prototype.tinyint = 'tinyint';
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ColumnCompiler.prototype.floating = function (precision, scale) {
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return `float(${this._num(precision, 8)}, ${this._num(scale, 2)})`;
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};
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ColumnCompiler.prototype.decimal = function (precision, scale) {
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if (precision === null) {
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throw new Error(
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'Specifying no precision on decimal columns is not supported for that SQL dialect.'
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);
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}
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return `decimal(${this._num(precision, 8)}, ${this._num(scale, 2)})`;
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};
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ColumnCompiler.prototype.binary = 'blob';
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ColumnCompiler.prototype.bool = 'boolean';
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ColumnCompiler.prototype.date = 'date';
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ColumnCompiler.prototype.datetime = 'datetime';
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ColumnCompiler.prototype.time = 'time';
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ColumnCompiler.prototype.timestamp = 'timestamp';
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ColumnCompiler.prototype.enu = 'varchar';
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ColumnCompiler.prototype.bit = ColumnCompiler.prototype.json = 'text';
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ColumnCompiler.prototype.uuid = 'char(36)';
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ColumnCompiler.prototype.specifictype = (type) => type;
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// Modifiers
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// -------
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ColumnCompiler.prototype.nullable = (nullable) =>
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nullable === false ? 'not null' : 'null';
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ColumnCompiler.prototype.notNullable = function () {
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return this.nullable(false);
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};
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ColumnCompiler.prototype.defaultTo = function (value) {
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if (value === void 0) {
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return '';
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} else if (value === null) {
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value = 'null';
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} else if (value instanceof Raw) {
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value = value.toQuery();
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} else if (this.type === 'bool') {
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if (value === 'false') value = 0;
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value = `'${value ? 1 : 0}'`;
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} else if (
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(this.type === 'json' || this.type === 'jsonb') &&
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isObject(value)
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) {
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value = `'${JSON.stringify(value)}'`;
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} else {
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value = `'${value}'`;
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}
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return `default ${value}`;
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};
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ColumnCompiler.prototype._num = function (val, fallback) {
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if (val === undefined || val === null) return fallback;
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const number = parseInt(val, 10);
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return isNaN(number) ? fallback : number;
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};
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export default ColumnCompiler;
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