node-query/API.md

NodeQuery

Class for connection management

getQuery

Return an existing query builder instance

Returns QueryBuilder The Query Builder object

init

Create a query builder object

Parameters

• driverType String The name of the database type, eg. mysql or pg
• connObject Object A connection object from the database library you are connecting with
• connLib [String] The name of the db connection library you are using, eg. mysql or mysql2. Optional if the same as driverType

Returns QueryBuilder The Query Builder object

QueryBuilder

Main object that builds SQL queries.

Parameters

• Driver Driver The syntax driver for the database
• Adapter Adapter The database module adapter for running queries

delete

Run the generated delete query

Parameters

• table String The table to insert into
• where [Object] Where clause for delete statement
• callback [Function] Callback for handling response from the database

Returns void or Promise If no callback is passed, a promise is returned

end

Closes the database connection for the current adapter

Returns void

from

Specify the database table to select from

Parameters

• tableName String The table to use for the current query

Examples

query.from('tableName');

query.from('tableName t'); // Select the table with an alias

Returns QueryBuilder The Query Builder object, for chaining

get

Get the results of the compiled query

Parameters

• table [String] The table to select from
• limit [Number] A limit for the query
• offset [Number] An offset for the query
• callback [Function] A callback for receiving the result

Examples

query.get('table_name').then(promiseCallback); // Get all the rows in the table

query.get('table_name', 5, callback); // Get 5 rows from the table

query.get(callback); // Get the results of a query generated with other methods

Returns void or Promise If no callback is passed, a promise is returned

getCompiledDelete

Return generated delete query SQL

Parameters

• table String the name of the table to delete from
• reset [Boolean] Whether to reset the query builder so another query can be built (optional, default true)

Returns String The compiled sql statement

getCompiledInsert

Return generated insert query SQL

Parameters

• table String the name of the table to insert into
• reset [Boolean] Whether to reset the query builder so another query can be built (optional, default true)

Returns String The compiled sql statement

getCompiledSelect

Return generated select query SQL

Parameters

• table [String] the name of the table to retrieve from
• reset [Boolean] Whether to reset the query builder so another query can be built (optional, default true)

Returns String The compiled sql statement

getCompiledUpdate

Return generated update query SQL

Parameters

• table String the name of the table to update
• reset [Boolean] Whether to reset the query builder so another query can be built (optional, default true)

Returns String The compiled sql statement

groupBy

Group the results by the selected field(s)

Parameters

• field String or Array The name of the field to group by

Returns QueryBuilder The Query Builder object, for chaining

groupEnd

Ends a logical grouping started with one of the groupStart methods

Returns QueryBuilder The Query Builder object, for chaining

groupStart

Adds an open paren to the current query for logical grouping

Returns QueryBuilder The Query Builder object, for chaining

having

Add a 'having' clause

Parameters

• key String or Object The name of the field and the comparision operator, or an object
• val [String or Number] The value to compare if the value of key is a string

Returns QueryBuilder The Query Builder object, for chaining

insert

Run the generated insert query

Parameters

• table String The table to insert into
• data [Object] Data to insert, if not already added with the 'set' method
• callback [Function] Callback for handling response from the database

Returns void or Promise If no callback is passed, a promise is returned

insertBatch

Insert multiple sets of rows at a time

Parameters

• table String The table to insert into
• data Array The array of objects containing data rows to insert
• callback [Function] Callback for handling database response

Examples

query.insertBatch('foo',[{id:1,val:'bar'},{id:2,val:'baz'}], callbackFunction);

query.insertBatch('foo',[{id:1,val:'bar'},{id:2,val:'baz'}])
.then(promiseCallback);

Returns void or Promise If no callback is passed, a promise is returned

join

Add a join clause to the query

Parameters

• table String The table you are joining
• cond String The join condition.
• type [String] The type of join, which defaults to inner (optional, default 'inner')

Returns QueryBuilder The Query Builder object, for chaining

like

Add a 'like/ and like' clause to the query

Parameters

• field String The name of the field to compare to
• val String The value to compare to
• pos [String] The placement of the wildcard character(s): before, after, or both (optional, default both)

Returns QueryBuilder The Query Builder object, for chaining

limit

Put a limit on the query

Parameters

• limit Number The maximum number of rows to fetch
• offset [Number] The row number to start from

Returns QueryBuilder The Query Builder object, for chaining

notLike

Add a 'not like/ and not like' clause to the query

Parameters

• field String The name of the field to compare to
• val String The value to compare to
• pos [String] The placement of the wildcard character(s): before, after, or both (optional, default both)

Returns QueryBuilder The Query Builder object, for chaining

orGroupStart

Adds an open paren to the current query for logical grouping, prefixed with 'OR'

Returns QueryBuilder The Query Builder object, for chaining

orHaving

Add an 'or having' clause

Parameters

• key String or Object The name of the field and the comparision operator, or an object
• val [String or Number] The value to compare if the value of key is a string

Returns QueryBuilder The Query Builder object, for chaining

orLike

Add an 'or like' clause to the query

Parameters

• field String The name of the field to compare to
• val String The value to compare to
• pos [String] The placement of the wildcard character(s): before, after, or both (optional, default both)

Returns QueryBuilder The Query Builder object, for chaining

orNotGroupStart

Adds an open paren to the current query for logical grouping, prefixed with 'OR NOT'

Returns QueryBuilder The Query Builder object, for chaining

orNotLike

Add an 'or not like' clause to the query

Parameters

• field String The name of the field to compare to
• val String The value to compare to
• pos [String] The placement of the wildcard character(s): before, after, or both (optional, default both)

Returns QueryBuilder The Query Builder object, for chaining

orWhere

Set a 'or where' clause

Parameters

• key String or Object The name of the field and the comparision operator, or an object
• val [String or Number] The value to compare if the value of key is a string

Returns QueryBuilder The Query Builder object, for chaining

orWhereIn

Set a 'or where in' clause

Parameters

• key String the field to search
• values Array the array of items to search in

Returns QueryBuilder The Query Builder object, for chaining

orWhereIsNotNull

Field is not null prefixed with 'OR'

Parameters

• field String The name of the field

Returns QueryBuilder The Query Builder object, for chaining

orWhereIsNull

Field is null prefixed with 'OR'

Parameters

• field String The name of the field

Returns QueryBuilder The Query Builder object, for chaining

orWhereNotIn

Set a 'or where not in' clause

Parameters

• key String the field to search
• values Array the array of items to search in

Returns QueryBuilder The Query Builder object, for chaining

orderBy

Order the results by the selected field(s)

Parameters

• field String The field(s) to order by
• type [String] The order direction, ASC or DESC (optional, default 'ASC')

Returns QueryBuilder The Query Builder object, for chaining

query

Manually make an sql query

Parameters

• sql string The sql to execute
• params [array] The query parameters
• callback [function] Optional callback

Returns void or Promise Returns a promise if no callback is supplied

resetQuery

Reset the object state for a new query

Returns void

select

Specify rows to select in the query

Parameters

• fields String or Array The fields to select from the current table

Examples

query.select('foo, bar'); // Select multiple fields with a string

query.select(['foo', 'bar']); // Select multiple fileds with an array

Returns QueryBuilder The Query Builder object, for chaining

set

Set values for insertion or updating

Parameters

• key String or Object The key or object to use
• val [String] The value if using a scalar key

Examples

query.set('foo', 'bar'); // Set a key, value pair

query.set({foo:'bar'}); // Set with an object

Returns QueryBuilder The Query Builder object, for chaining

update

Run the generated update query

Parameters

• table String The table to insert into
• data [Object] Data to insert, if not already added with the 'set' method
• callback [Function] Callback for handling response from the database

Returns void or Promise If no callback is passed, a promise is returned

where

Set a 'where' clause

Parameters

• key String or Object The name of the field and the comparision operator, or an object
• val [String or Number] The value to compare if the value of key is a string

Returns QueryBuilder The Query Builder object, for chaining

whereIn

Set a 'where in' clause

Parameters

• key String the field to search
• values Array the array of items to search in

Returns QueryBuilder The Query Builder object, for chaining

whereIsNotNull

Specify that a field IS NOT NULL

Parameters

• field String The name so the field that is not to be null

Returns QueryBuilder The Query Builder object, for chaining

whereIsNull

Select a field that is Null

Parameters

• field String The name of the field that has a NULL value

Returns QueryBuilder The Query Builder object, for chaining

whereNotIn

Set a 'where not in' clause

Parameters

• key String the field to search
• values Array the array of items to search in

Returns QueryBuilder The Query Builder object, for chaining