lib/schema/builder

var _ = require('lodash'); var inherits = require('inherits'); var EventEmitter = require('events').EventEmitter; var SqlString = require('../sqlstring');

Constructor for the builder instance, typically called from knex.builder, accepting the current knex instance, and pulling out the client and grammar from the current knex instance.

function SchemaBuilder() { this._sequence = []; this._errors = []; } inherits(SchemaBuilder, EventEmitter);

Each of the schema builder methods just add to the "_sequence" array for consistency.

_.each([ 'createTable', 'table', 'alterTable', 'hasTable', 'hasColumn', 'dropTable', 'renameTable', 'dropTableIfExists', 'raw' ], function(method) { SchemaBuilder.prototype[method] = function() { if (method === 'table') method = 'alterTable'; this._sequence.push({ method: method, args: _.toArray(arguments) }); return this; }; });

return '[object Knex:SchemaBuilder]';

SchemaBuilder.prototype.toString = function() { return this.toQuery(); };

Turn the current schema builder into a string...

SchemaBuilder.prototype.toQuery = function() { return _.reduce(this.toSQL(), function(memo, statement) { memo.push(SqlString.format(statement.sql, statement.bindings)); return memo; }, []).join(';\n') + ';'; }; SchemaBuilder.prototype.toSQL = function() { var SchemaCompiler = this.client.SchemaCompiler; return new SchemaCompiler(this).toSQL(); }; require('../interface')(SchemaBuilder); module.exports = SchemaBuilder;