HFSQtLi::CustomBind Class Reference

Accessor passed to custom data type bind An instance of this class will be passed as first parameter to customBind and customBindConst functions (See Custom data types). More...

#include <HFSQtLi.h>

Public Member Functions
template<class ... T>
int	bind (T &&...value)
	Binds some values This function is roughly equivalent to calling Query::bind. It will bind one or more values. Note that the function will start binding from the column following the last bound column. E.g. in: More...
template<class ... T>
int	bindIndex (int i, T &&...value)
	Binds some values This function is roughly equivalent to calling Query::bind. It will bind one or more values. Note that the function will start binding from the column following the last column bind by the query. E.g. in: More...
constexpr int	numBound ()
	Gets the number of bound columns so far by this custom accessor. Number of bound column is defined as the maximum column index bound minus the first column index associated with the accessor plus one. If no column has yet be bound returns 0. More...

Protected Member Functions
constexpr	CustomBind (Query *query, int base)

Protected Attributes
Query *	m_query
int	m_base
int	m_bound

Friends
class	Query

Detailed Description

Accessor passed to custom data type bind An instance of this class will be passed as first parameter to customBind and customBindConst functions (See Custom data types).

The function will be able to use it to bind the columns with value from the object given as second parameter.

Example usage:

struct MyType
{
  int a;
  QString b;
};
 
void customBindConst(CustomBind &bind, const MyType &val)
{
  bind.bind(val.a, val.b);
}
 
...
  int x;
  QString y;
  db->executeSingleAll<1>("SELECT $1, $2", MyType{1, "Hello, world"}, x, y);
  qDebug()<<x<<y; // Prints 1 "Hello, world"
...

Member Function Documentation

bind()

template<class ... T>

int HFSQtLi::CustomBind::bind ( T &&...  value )

inline

Binds some values This function is roughly equivalent to calling Query::bind. It will bind one or more values. Note that the function will start binding from the column following the last bound column. E.g. in:

... qry.bind(4, 3, MyCustomType);
 
 void customBindConst(CustomBind &bind, const MyCustomType &val)
{
  bind.bind(12); // This will bind 3rd column
  bind.bind("Hello"); // This will bind 4th column
}

Parameters

value

Is a list of objects to bind

Returns

0 on error, 1+number of bounded columns on failure

bindIndex()

template<class ... T>

int HFSQtLi::CustomBind::bindIndex ( int  i, T &&...  value  )

inline

Binds some values This function is roughly equivalent to calling Query::bind. It will bind one or more values. Note that the function will start binding from the column following the last column bind by the query. E.g. in:

... qry.bind(4, 3, MyCustomType);
 
 void customBindConst(CustomBind &bind, const MyCustomType &val)
{
  bind.bindIndex(2. "Hello"); // This will bind 4th column
  bind.bindIndex(1, 12);      // This will bind 3rd column
}

Parameters

i	1-based index of first column to bind. Note that the 0 column is the one currently binding
value	Is a list of objects to bind

Returns

0 on error, 1+number of bounded columns on failure

numBound()

constexpr int HFSQtLi::CustomBind::numBound ( )

inlineconstexpr

Gets the number of bound columns so far by this custom accessor. Number of bound column is defined as the maximum column index bound minus the first column index associated with the accessor plus one. If no column has yet be bound returns 0.

Returns

The number of columns bound so far, or -1 if any error occoured in one of the binds

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

• HFSQtLi/HFSQtLi.h