Fish Query

Super simple query string builder. Currently only supports SELECT and cater to PostgreSQL query format.
Built using ES6 Class.

Installation

NPM:
> npm install fish-query

Yarn:
> yarn add fish-query

Usage

const QueryBuilder = require('fish-query');

const config = {
	datastore: 'postgresql'	//Currently support 'postgresql' and 'sqlserver'. Default to 'postgresql' when not specified.
};

const queryClass = new QueryBuilder(config);

let queryString = queryClass
                    .addSelect('firstName')
                    .setFirstTable('user')
                    .generateQuery();
console.log(queryString);

Output should be SELECT firstName from user;

Method

> addSelect

Add the select column on query
Parameter:

1. String. e.g. : user
2. Object with property: tableName, columnName, columnAlias (will be formatted to PostgreSQL accepted format)

> addMultipleSelect

Add multiple select column on query
Parameter: Array of Parameters on addSelect

> removeSelect

Remove select column on query Parameter:

1. String. e.g. : firstName
2. Object with property: tableName, columnName (will be formatted to PostgreSQL accepted format)

> setFirstTable

Table name specified on FROM
Parameter:

1. String. e.g. : user
2. Object with property: tableName, alias (will be formatted to PostgreSQL accepted format)

> joinTable

Join the tables Parameter Object:

1. joinType: 'FULL JOIN', 'INNER JOIN', etc
2. firstTable: new table that wants to be joined
3. firstTableAlias: alias of the new table (optional)
4. firstKey: the key that wants to be connected to second table
5. secondTable: other table that wants to be compared with first table
6. secondTableAlias: other table alias (optional)
7. secondKey: the key that wants to be connected to first table

Alias will be prioritized when comparing

> addWhere

Add where condition Parameter Object:

1. column: String or Object. If Object the properties are : tableName, columnName
2. operator: '=', etc
3. value: value to be compared

Currently only supports AND for all the where clause.

> addOrder

Add Order By Parameter:

1. String, e.g. : 'firstName DESC'
2. Object with property:
   orderBy: Object with property: tableName, columnName
   orderType: 'ASC', 'DESC'

> generateQuery

Generate the Query String after setting up the QueryBuilder instance.

Tests

> npm test

Contributing

In lieu of a formal style guide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code.
As this is a very initial phase, any contribution would be welcomed to support other query formats, or to have UPDATE, INSERT, DELETE, etc.

Future Plan

Add UPDATE, INSERT, DELETE

Author Note

'Ah, I want to eat fish query'

License

MIT License