UpdateQuery Class Reference

QSqlQuery wrapper for UPDATE ... SET ... WHERE ... query execution. More...

#include <EasyQtSql_UpdateQuery.h>

Public Member Functions
	UpdateQuery (const QString &table, const QSqlDatabase &db)
UpdateQuery &	set (const QString &field, const QVariant &value)
	Sets table field to value More...
UpdateQuery &	set (const QVariantMap &map)
	Sets table fields to values from map More...
NonQueryResult	where (const QString &expr)
	Executes update query with expr condition. More...
NonQueryResult	where (const QString &expr, const QVariant &last)
	Executes update query with expr condition and last parameter binding. More...
template<typename... Rest>
NonQueryResult	where (const QString &expr, const QVariant &first, const Rest &... rest)
NonQueryResult	exec ()
	Executes UPDATE query without conditions. More...

Detailed Description

QSqlQuery wrapper for UPDATE ... SET ... WHERE ... query execution.

Constructor & Destructor Documentation

UpdateQuery()

UpdateQuery::UpdateQuery ( const QString &  table, const QSqlDatabase &  db  )

inline

Member Function Documentation

exec()

NonQueryResult UpdateQuery::exec ( )

inline

Executes UPDATE query without conditions.

set() [1/2]

UpdateQuery& UpdateQuery::set ( const QString &  field, const QVariant &  value  )

inline

Sets table field to value

Parameters

field	Table field name
value	Value to set

Returns

UpdateQuery reference

The method returns an UpdateQuery reference so its call can be chained:

//UPDATE table SET a=111, b=222
t.update("table")
      .set("a", 111) //method chaining
      .set("b", 222)
      .exec();

set() [2/2]

UpdateQuery& UpdateQuery::set ( const QVariantMap &  map )

inline

Sets table fields to values from map

Parameters

map	Values map. Map key is field name, map value is field value.

The method returns an UpdateQuery reference so its calls can be chained.

//UPDATE table SET a=111, b=222
t.update("table")
      .set(QVariantMap{ {"a", 111}, {"b", 222} })
      .exec();

where() [1/3]

NonQueryResult UpdateQuery::where ( const QString &  expr )

inline

Executes update query with expr condition.

Parameters

expr	WHERE condition

//UPDATE table SET a=111, b=222 WHERE a=1 AND b=2
t.update("table")
      .set(QVariantMap{ {"a", 111}, {"b", 222} })
      .where("a=1 AND b=2");

where() [2/3]

NonQueryResult UpdateQuery::where ( const QString &  expr, const QVariant &  last  )

inline

Executes update query with expr condition and last parameter binding.

Parameters

expr	WHERE condition
last	Parameter to bind on WHERE expression

The method supports variable count of QVariant parameters. Parameters are bound with QSqlQuery::addBindValue.

//UPDATE table SET a=111, b=222 WHERE a=1 AND b=2
t.update("table")
      .set(QVariantMap{ {"a", 111}, {"b", 222} })
      .where("a=? AND b=?", 1, 2);

where() [3/3]

template<typename... Rest>

NonQueryResult UpdateQuery::where ( const QString &  expr, const QVariant &  first, const Rest &...  rest  )

inline

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The documentation for this class was generated from the following file:

• EasyQtSql/EasyQtSql_UpdateQuery.h