/
columncompiler.js
179 lines (154 loc) · 5.29 KB
/
columncompiler.js
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// Column Compiler
// Used for designating column definitions
// during the table "create" / "alter" statements.
// -------
const helpers = require('./internal/helpers');
const groupBy = require('lodash/groupBy');
const first = require('lodash/first');
const has = require('lodash/has');
const tail = require('lodash/tail');
const { toNumber } = require('../util/helpers');
const { formatDefault } = require('../formatter/formatterUtils');
class ColumnCompiler {
constructor(client, tableCompiler, columnBuilder) {
this.client = client;
this.tableCompiler = tableCompiler;
this.columnBuilder = columnBuilder;
this._commonBuilder = this.columnBuilder;
this.args = columnBuilder._args;
this.type = columnBuilder._type.toLowerCase();
this.grouped = groupBy(columnBuilder._statements, 'grouping');
this.modified = columnBuilder._modifiers;
this.isIncrements = this.type.indexOf('increments') !== -1;
this.formatter = client.formatter(columnBuilder);
this.bindings = [];
this.formatter.bindings = this.bindings;
this.bindingsHolder = this;
this.sequence = [];
this.modifiers = [];
}
defaults(label) {
if (Object.prototype.hasOwnProperty.call(this._defaultMap, label)) {
return this._defaultMap[label].bind(this)();
} else {
throw new Error(
`There is no default for the specified identifier ${label}`
);
}
}
// To convert to sql, we first go through and build the
// column as it would be in the insert statement
toSQL() {
this.pushQuery(this.compileColumn());
if (this.sequence.additional) {
this.sequence = this.sequence.concat(this.sequence.additional);
}
return this.sequence;
}
// Compiles a column.
compileColumn() {
return (
this.formatter.wrap(this.getColumnName()) +
' ' +
this.getColumnType() +
this.getModifiers()
);
}
// Assumes the autoincrementing key is named `id` if not otherwise specified.
getColumnName() {
const value = first(this.args);
return value || this.defaults('columnName');
}
getColumnType() {
// Column type is cached so side effects (such as in pg native enums) are only run once
if (!this._columnType) {
const type = this[this.type];
this._columnType =
typeof type === 'function' ? type.apply(this, tail(this.args)) : type;
}
return this._columnType;
}
getModifiers() {
const modifiers = [];
for (let i = 0, l = this.modifiers.length; i < l; i++) {
const modifier = this.modifiers[i];
//Cannot allow 'nullable' modifiers on increments types
if (!this.isIncrements || (this.isIncrements && modifier === 'comment')) {
if (has(this.modified, modifier)) {
const val = this[modifier].apply(this, this.modified[modifier]);
if (val) modifiers.push(val);
}
}
}
return modifiers.length > 0 ? ` ${modifiers.join(' ')}` : '';
}
// Types
// ------
varchar(length) {
return `varchar(${toNumber(length, 255)})`;
}
floating(precision, scale) {
return `float(${toNumber(precision, 8)}, ${toNumber(scale, 2)})`;
}
decimal(precision, scale) {
if (precision === null) {
throw new Error(
'Specifying no precision on decimal columns is not supported for that SQL dialect.'
);
}
return `decimal(${toNumber(precision, 8)}, ${toNumber(scale, 2)})`;
}
// Used to support custom types
specifictype(type) {
return type;
}
// Modifiers
// -------
nullable(nullable) {
return nullable === false ? 'not null' : 'null';
}
notNullable() {
return this.nullable(false);
}
defaultTo(value) {
return `default ${formatDefault(value, this.type, this.client)}`;
}
}
ColumnCompiler.prototype.binary = 'blob';
ColumnCompiler.prototype.bool = 'boolean';
ColumnCompiler.prototype.date = 'date';
ColumnCompiler.prototype.datetime = 'datetime';
ColumnCompiler.prototype.time = 'time';
ColumnCompiler.prototype.timestamp = 'timestamp';
ColumnCompiler.prototype.geometry = 'geometry';
ColumnCompiler.prototype.geography = 'geography';
ColumnCompiler.prototype.point = 'point';
ColumnCompiler.prototype.enu = 'varchar';
ColumnCompiler.prototype.bit = ColumnCompiler.prototype.json = 'text';
ColumnCompiler.prototype.uuid = ({ useBinaryUuid = false } = {}) =>
useBinaryUuid ? 'binary(16)' : 'char(36)';
ColumnCompiler.prototype.increments = ({ primaryKey = true } = {}) =>
'integer not null' + (primaryKey ? ' primary key' : '') + ' autoincrement';
ColumnCompiler.prototype.bigincrements = ({ primaryKey = true } = {}) =>
'integer not null' + (primaryKey ? ' primary key' : '') + ' autoincrement';
ColumnCompiler.prototype.integer =
ColumnCompiler.prototype.smallint =
ColumnCompiler.prototype.mediumint =
'integer';
ColumnCompiler.prototype.biginteger = 'bigint';
ColumnCompiler.prototype.text = 'text';
ColumnCompiler.prototype.tinyint = 'tinyint';
ColumnCompiler.prototype.pushQuery = helpers.pushQuery;
ColumnCompiler.prototype.pushAdditional = helpers.pushAdditional;
ColumnCompiler.prototype.unshiftQuery = helpers.unshiftQuery;
ColumnCompiler.prototype._defaultMap = {
columnName: function () {
if (!this.isIncrements) {
throw new Error(
`You did not specify a column name for the ${this.type} column.`
);
}
return 'id';
},
};
module.exports = ColumnCompiler;