knex/lib/dialects/postgres/schema/columncompiler.js

// PostgreSQL Column Compiler
// -------

'use strict';

var inherits = require('inherits');
var ColumnCompiler = require('../../../schema/columncompiler');
var assign = require('lodash/object/assign');

function ColumnCompiler_PG() {
  ColumnCompiler.apply(this, arguments);
  this.modifiers = ['nullable', 'defaultTo', 'comment'];
}
inherits(ColumnCompiler_PG, ColumnCompiler);

assign(ColumnCompiler_PG.prototype, {

  // Types
  // ------
  bigincrements: 'bigserial primary key',
  bigint: 'bigint',
  binary: 'bytea',

  bit: function bit(column) {
    return column.length !== false ? 'bit(' + column.length + ')' : 'bit';
  },

  bool: 'boolean',

  // Create the column definition for an enum type.
  // Using method "2" here: http://stackoverflow.com/a/10984951/525714
  enu: function enu(allowed) {
    return 'text check (' + this.formatter.wrap(this.args[0]) + " in ('" + allowed.join("', '") + "'))";
  },

  double: 'double precision',
  floating: 'real',
  increments: 'serial primary key',
  json: function json(jsonb) {
    if (!this.client.version || parseFloat(this.client.version) >= 9.2) return jsonb ? 'jsonb' : 'json';
    return 'text';
  },
  smallint: 'smallint',
  tinyint: 'smallint',
  datetime: function datetime(without) {
    return without ? 'timestamp' : 'timestamptz';
  },
  timestamp: function timestamp(without) {
    return without ? 'timestamp' : 'timestamptz';
  },
  uuid: 'uuid',

  // Modifiers:
  // ------
  comment: function comment(_comment) {
    this.pushAdditional(function () {
      this.pushQuery('comment on column ' + this.tableCompiler.tableName() + '.' + this.formatter.wrap(this.args[0]) + " is " + (_comment ? "'" + _comment + "'" : 'NULL'));
    }, _comment);
  }

});

module.exports = ColumnCompiler_PG;