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58 lines
1.5 KiB
JavaScript
58 lines
1.5 KiB
JavaScript
'use strict';
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// SQLite3: Column Builder & Compiler
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// -------
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module.exports = function(client) {
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var _ = require('lodash');
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var inherits = require('inherits');
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var Schema = require('../../../schema');
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// Schema Builder
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// -------
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function SchemaBuilder_SQLite3() {
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this.client = client;
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Schema.Builder.apply(this, arguments);
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}
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inherits(SchemaBuilder_SQLite3, Schema.Builder);
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// Schema Compiler
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// -------
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function SchemaCompiler_SQLite3() {
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this.client = client;
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this.Formatter = client.Formatter;
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Schema.Compiler.apply(this, arguments);
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}
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inherits(SchemaCompiler_SQLite3, Schema.Compiler);
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// Compile the query to determine if a table exists.
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SchemaCompiler_SQLite3.prototype.hasTable = function(tableName) {
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this.pushQuery({
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sql: "select * from sqlite_master where type = 'table' and name = " + this.formatter.parameter(tableName),
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output: function(resp) {
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return resp.length > 0;
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}
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});
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};
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// Compile the query to determine if a column exists.
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SchemaCompiler_SQLite3.prototype.hasColumn = function(tableName, column) {
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this.pushQuery({
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sql: 'PRAGMA table_info(' + this.formatter.wrap(tableName) + ')',
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output: function(resp) {
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return _.some(resp, {name: column});
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}
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});
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};
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// Compile a rename table command.
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SchemaCompiler_SQLite3.prototype.renameTable = function(from, to) {
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this.pushQuery('alter table ' + this.formatter.wrap(from) + ' rename to ' + this.formatter.wrap(to));
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};
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client.SchemaBuilder = SchemaBuilder_SQLite3;
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client.SchemaCompiler = SchemaCompiler_SQLite3;
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}; |