sql-utils

Various SQL utilities for Node.js

Installation

$ npm i -s @allnulled/sql-utils

Usage

const SQLUtils = require("sql-utils");
const whereSQL = SQLUtils.whereToSQL({
	name: "somename",
	password: "somepassword"
});
const query = `SELECT * FROM user WHERE ${whereSQL}`;

whereToSQL function

SQLUtils.whereToSQL(...) allows to obtain SQL WHERE expressions from:

• Object: where each property is a column, and each value, a SQL (escaped) value.
• Array: where each item represents:
  • 2 values: SQL column and value, bound by =
  • 3 values: SQL column, SQL logic operators, and value
• String: inline SQL injections are allowed by the framework, to fully customize what is going on WHERE SQL expressions.

This function also allows you to use in and not in operators with Arrays of values (that will be safely escaped).

API

const SQLUtils = require("sql-utils")

Type: Class

Description: Class that contains the whole API of the package.

SQLUtils.die(...args:any)

Type: Static method

Description: Prints by console whatever you pass, and kills the process.

SQLUtils.getPropertiesSQL(property:String|Any, table:String|Boolean)

Type: Static method

Parameter:

• property:String|Any. SQL column name. When it is not a string, it is returned directly.

• table:String|Boolean. Optional. SQL table name. When it is a falsy value, it is omitted.

Return: sql:String. SQL code to represent this column.

Description: Splits the property by ".", escaped as SQL ids every part, and prefixes with the name of the table, if any.

SQLUtils.generateToken(length:Integer, charset:Array)

Type: Static method

Parameter:

• length:Integer. Required. Number of characters for the token.

• charset:Array<String>. Optional. Valid characters for the token.

Return: token:String. Generated token.

Description: Returns a token from the pool of characters provided.

SQLUtils.rowsToObject(rows:Array<Object>, table:String, columnId:String)

Type: Static method

Parameter:

• rows:Array<Object>. Required. Data in arrays of objects, where each object property is read like: $table.$column.

• table:String. Required. Table to extract the data from.

• columnId:String. Optional. Column to index all data rows by. By default: "id".

Return: formattedData:Array<Object>. Data resulted from the operation.

Description: Returns an array of objects with the properties like ${table}.* grouped by the rows that have the same columnId.

SQLUtils.whereToSQL(where:Array|Object, table:String, andPrefix:Boolean, defaultValue:String)

Type: Static method

Parameter:

• where:Object|Array. Required. As object, it must contain the properties (columns) and the expected values. As array, it must contain arrays of 2 or 3 items: subject and object, or subject, operator and object respectively.

• table:String. Optional. Table used to prefix the properties in this where statement part. By default: false.

• andPrefix:Boolean. Optional. If true, a AND will prefix the generated code. By default: false.

• defaultValue:String. Required. Column to index all data rows by. By default: "1 = 1".

Return: sql:String. SQL code that represents this partial WHERE statement.

Description: Returns SQL code to represent a specific WHERE statement part.

License

This project is under WTFPL, which means basically: do What The Fuck you want with it.

Contact

Please, address issues and suggestions here. Thank you.