KDbAlterTableHandler::ChangeFieldPropertyAction Class Reference

#include <KDbAlter.h>

Inheritance diagram for KDbAlterTableHandler::ChangeFieldPropertyAction:

Public Member Functions
	ChangeFieldPropertyAction ()
	ChangeFieldPropertyAction (const QString &fieldName, const QString &propertyName, const QVariant &newValue, int uid)
QString	debugString (const DebugOptions &debugOptions=DebugOptions()) override
QVariant	newValue () const
QString	propertyName () const
bool	shouldBeRemoved (ActionDictDict *fieldActions) override
void	simplifyActions (ActionDictDict *fieldActions) override
tristate	updateTableSchema (KDbTableSchema *table, KDbField *field, QHash< QString, QString > *fieldHash) override
Public Member Functions inherited from KDbAlterTableHandler::FieldActionBase
	FieldActionBase (const QString &fieldName, int uid)
QString	fieldName () const
void	setFieldName (const QString &fieldName)
int	uid () const
Public Member Functions inherited from KDbAlterTableHandler::ActionBase
void	debug (const DebugOptions &debugOptions=DebugOptions())
bool	isNull () const
ChangeFieldPropertyAction &	toChangeFieldPropertyAction ()
InsertFieldAction &	toInsertFieldAction ()
MoveFieldPositionAction &	toMoveFieldPositionAction ()
RemoveFieldAction &	toRemoveFieldAction ()

Protected Member Functions
	ChangeFieldPropertyAction (bool null)
tristate	execute (KDbConnection *conn, KDbTableSchema *table) override
void	updateAlteringRequirements () override
Protected Member Functions inherited from KDbAlterTableHandler::FieldActionBase
	FieldActionBase (bool null)
Protected Member Functions inherited from KDbAlterTableHandler::ActionBase
	ActionBase (bool null)
int	alteringRequirements () const
void	setAlteringRequirements (int alteringRequirements)

Protected Attributes
QVariant	m_newValue
QString	m_propertyName
Protected Attributes inherited from KDbAlterTableHandler::FieldActionBase
int	m_fieldUID

Detailed Description

Defines an action for changing a single property value of a table field. Supported properties are currently: "name", "type", "caption", "description", "unsigned", "maxLength", "precision", "defaultWidth", "defaultValue", "primaryKey", "unique", "notNull", "allowEmpty", "autoIncrement", "indexed", "visibleDecimalPlaces"

More to come.

Definition at line 295 of file KDbAlter.h.

Constructor & Destructor Documentation

ChangeFieldPropertyAction() [1/2]

KDbAlterTableHandler::ChangeFieldPropertyAction::ChangeFieldPropertyAction

(

)

Creates null action.

Definition at line 202 of file KDbAlter.cpp.

ChangeFieldPropertyAction() [2/2]

KDbAlterTableHandler::ChangeFieldPropertyAction::ChangeFieldPropertyAction ( bool  null )

explicitprotected

, used for constructing null action

Definition at line 207 of file KDbAlter.cpp.

Member Function Documentation

execute()

tristate KDbAlterTableHandler::ChangeFieldPropertyAction::execute ( KDbConnection *  conn, KDbTableSchema *  table  )

overrideprotectedvirtual

Performs physical execution of this action.

Many of the properties must be applied using a separate algorithm.

Todo:

errmsg

Todo:

Reimplemented from KDbAlterTableHandler::ActionBase.

Definition at line 422 of file KDbAlter.cpp.

shouldBeRemoved()

bool KDbAlterTableHandler::ChangeFieldPropertyAction::shouldBeRemoved ( ActionDictDict *  fieldActions )

overridevirtual

After calling simplifyActions() for each action, shouldBeRemoved() is called for them as an additional step. This is used for ChangeFieldPropertyAction items so actions that do not change property values are removed.

Reimplemented from KDbAlterTableHandler::ActionBase.

Definition at line 394 of file KDbAlter.cpp.

simplifyActions()

void KDbAlterTableHandler::ChangeFieldPropertyAction::simplifyActions ( ActionDictDict *  fieldActions )

overridevirtual

Legend: A,B==fields, P==property, [....]==action, (..,..,..) group of actions, <...> internal operation. Case 1. (special) when new action=[rename A to B] and exists=[rename B to C] => remove [rename B to C] and set result to new [rename A to C] and go to 1b. Case 1b. when new action=[rename A to B] and actions exist like [set property P to C in field B] or like [delete field B] or like [move field B] => change B to A for all these actions Case 2. when new action=[change property in field A] (property != name) and exists=[remove A] or exists=[change property in field A] => do not add [change property in field A] because it will be removed anyway or the property will change

Reimplemented from KDbAlterTableHandler::ActionBase.

Definition at line 325 of file KDbAlter.cpp.

---

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

• KDbAlter.h
• KDbAlter.cpp