如何在 QDataWidgetMapper 中将字符串转换为日期格式？
How to convert string to date format in QDataWidgetMapper?
示例代码如下：
import sys
from PyQt5 import QtCore, QtWidgets, QtSql, uic
class FilterProxyModel(QtCore.QSortFilterProxyModel):
def __init__(self, parent=None):
super().__init__(parent)
self._filter_value = None
@property
def filter_value(self):
return self._filter_value
@filter_value.setter
def filter_value(self, value):
self._filter_value = value
self.invalidateFilter()
def filterAcceptsRow(self, sourceRow, sourceParent):
if self.filter_value is None:
return super().filterAcceptsRow(sourceRow, sourceParent)
if self.filterKeyColumn() >= 0:
value = (
self.sourceModel()
.index(sourceRow, self.filterKeyColumn(), sourceParent)
.data(self.filterRole())
)
return value == self.filter_value
for column in range(self.columnCount()):
value = (
self.sourceModel()
.index(sourceRow, column, sourceParent)
.data(self.filterRole())
)
if value == self.filter_value:
return True
return False
def setFilterRegExp(self, filter):
self.filter_value = None
super().setFilterRegExp(filter)
class UI(QtWidgets.QMainWindow):
def __init__(self):
super(UI, self).__init__()
uic.loadUi("tableview.ui", self)
self.tableView.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
db = QtSql.QSqlDatabase.addDatabase("QSQLITE")
db.setDatabaseName("book.db")
db.open()
self.model = QtSql.QSqlTableModel(self)
self.model.setTable("card")
self.model.select()
self.proxy = FilterProxyModel(self)
self.proxy.setSourceModel(self.model)
self.tableView.setModel(self.proxy)
self.model.select()
self.edit.clicked.connect(self.edit_items)
self.refresh.clicked.connect(self.refresh_table)
r = self.model.record()
column_names = [r.field(i).name().title() for i in range(r.count())]
self.comboBox.addItems([x for x in column_names])
self.horizontalHeader = self.tableView.horizontalHeader()
self.horizontalHeader.sectionClicked.connect(
self.tableView_horizontalHeader_sectionClicked
)
self.lineEdit.textChanged.connect(self.lineEdit_textChanged)
def tableView_horizontalHeader_sectionClicked(self, logicalIndex):
menu = QtWidgets.QMenu(self)
values = []
for row in range(self.model.rowCount()):
value = self.model.index(row, logicalIndex).data(self.proxy.filterRole())
values.append(value)
action_all = QtWidgets.QAction("All", self)
action_all.setData(None)
menu.addAction(action_all)
menu.addSeparator()
for value in sorted(list(set(values))):
action = QtWidgets.QAction(str(value), self)
action.setData(value)
menu.addAction(action)
headerPos = self.tableView.mapToGlobal(self.horizontalHeader.pos())
posY = headerPos.y() + self.horizontalHeader.height()
posX = headerPos.x() + self.horizontalHeader.sectionPosition(logicalIndex)
action = menu.exec_(QtCore.QPoint(posX, posY))
if action is not None:
self.proxy.setFilterKeyColumn(logicalIndex)
self.proxy.filter_value = action.data()
def lineEdit_textChanged(self):
search = QtCore.QRegExp(
self.lineEdit.text(), QtCore.Qt.CaseInsensitive, QtCore.QRegExp.RegExp
)
self.proxy.setFilterKeyColumn(self.comboBox.currentIndex())
self.proxy.setFilterRegExp(search)
def edit_items(self):
if not self.model.rowCount():
return
index = self.tableView.currentIndex()
if index.isValid():
row = index.row()
else:
row = 0
name_line = QtWidgets.QLineEdit(readOnly=True)
age_edit = QtWidgets.QSpinBox()
gender_combo = QtWidgets.QComboBox()
genders = "M", "F"
gender_combo.addItems(genders)
date_of_birth = QtWidgets.QDateEdit()
date_of_birth.setDisplayFormat("d-MMM-yyyy")
updateButton = QtWidgets.QPushButton("Update")
mapper = QtWidgets.QDataWidgetMapper()
mapper.setSubmitPolicy(QtWidgets.QDataWidgetMapper.ManualSubmit)
mapper.setModel(self.tableView.model())
mapper.addMapping(name_line, 0)
mapper.addMapping(age_edit, 1)
mapper.addMapping(gender_combo, 2)
mapper.addMapping(date_of_birth, 3)
mapper.setCurrentIndex(row)
dialog = QtWidgets.QDialog()
dialog.setWindowTitle("Edit Window")
layout = QtWidgets.QVBoxLayout(dialog)
formLayout = QtWidgets.QFormLayout()
layout.addLayout(formLayout)
formLayout.addRow("Name", name_line)
formLayout.addRow("Age", age_edit)
formLayout.addRow("Gender", gender_combo)
formLayout.addRow("Date of Birth", date_of_birth)
layout.addWidget(updateButton)
updateButton.clicked.connect(dialog.accept)
if dialog.exec_():
mapper.submit()
def refresh_table(self):
print("refresh")
def main():
app = QtWidgets.QApplication(sys.argv)
w = UI()
w.show()
sys.exit(app.exec_())
if __name__ == "__main__":
main()
我正在尝试使用 QDataWidgetMapper() 编辑来自 Qsqltablemodel 的行数据。日期列在我的数据库 table 中是文本格式，我想使用日期格式为“d-MMM-yyyy”。当我尝试编辑该行时，日期列将默认日期格式设置为“1-1-2000”。
这该怎么做？
下面是示例图片：
默认情况下，QtSql 可以处理具有特定格式的字符串列，例如 QDate 和 QDateTime（如 the sqlite docs 中所示），但在这种情况下它不符合这些格式，因此 Qt 不知道如何解释它们并将它们显示为文本。因此，您必须使用委托将该文本转换为 QDate，反之亦然：
class ItemDelegate(QtWidgets.QItemDelegate):
def setEditorData(self, editor, index):
if index.column() == 3 and isinstance(editor, QtWidgets.QDateEdit):
text = index.data()
date = QtCore.QDate.fromString(text, "d-MMM-yyyy")
editor.setDate(date)
return
super().setEditorData(editor, index)
def setModelData(self, editor, model, index):
if index.column() == 3 and isinstance(editor, QtWidgets.QDateEdit):
text = editor.date().toString("d-MMM-yyyy")
model.setData(index, text)
return
super().setModelData(editor, model, index)
# ...
mapper = QtWidgets.QDataWidgetMapper()
delegate = ItemDelegate(mapper)
mapper.setItemDelegate(delegate)
# ...
示例代码如下：
import sys
from PyQt5 import QtCore, QtWidgets, QtSql, uic
class FilterProxyModel(QtCore.QSortFilterProxyModel):
def __init__(self, parent=None):
super().__init__(parent)
self._filter_value = None
@property
def filter_value(self):
return self._filter_value
@filter_value.setter
def filter_value(self, value):
self._filter_value = value
self.invalidateFilter()
def filterAcceptsRow(self, sourceRow, sourceParent):
if self.filter_value is None:
return super().filterAcceptsRow(sourceRow, sourceParent)
if self.filterKeyColumn() >= 0:
value = (
self.sourceModel()
.index(sourceRow, self.filterKeyColumn(), sourceParent)
.data(self.filterRole())
)
return value == self.filter_value
for column in range(self.columnCount()):
value = (
self.sourceModel()
.index(sourceRow, column, sourceParent)
.data(self.filterRole())
)
if value == self.filter_value:
return True
return False
def setFilterRegExp(self, filter):
self.filter_value = None
super().setFilterRegExp(filter)
class UI(QtWidgets.QMainWindow):
def __init__(self):
super(UI, self).__init__()
uic.loadUi("tableview.ui", self)
self.tableView.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
db = QtSql.QSqlDatabase.addDatabase("QSQLITE")
db.setDatabaseName("book.db")
db.open()
self.model = QtSql.QSqlTableModel(self)
self.model.setTable("card")
self.model.select()
self.proxy = FilterProxyModel(self)
self.proxy.setSourceModel(self.model)
self.tableView.setModel(self.proxy)
self.model.select()
self.edit.clicked.connect(self.edit_items)
self.refresh.clicked.connect(self.refresh_table)
r = self.model.record()
column_names = [r.field(i).name().title() for i in range(r.count())]
self.comboBox.addItems([x for x in column_names])
self.horizontalHeader = self.tableView.horizontalHeader()
self.horizontalHeader.sectionClicked.connect(
self.tableView_horizontalHeader_sectionClicked
)
self.lineEdit.textChanged.connect(self.lineEdit_textChanged)
def tableView_horizontalHeader_sectionClicked(self, logicalIndex):
menu = QtWidgets.QMenu(self)
values = []
for row in range(self.model.rowCount()):
value = self.model.index(row, logicalIndex).data(self.proxy.filterRole())
values.append(value)
action_all = QtWidgets.QAction("All", self)
action_all.setData(None)
menu.addAction(action_all)
menu.addSeparator()
for value in sorted(list(set(values))):
action = QtWidgets.QAction(str(value), self)
action.setData(value)
menu.addAction(action)
headerPos = self.tableView.mapToGlobal(self.horizontalHeader.pos())
posY = headerPos.y() + self.horizontalHeader.height()
posX = headerPos.x() + self.horizontalHeader.sectionPosition(logicalIndex)
action = menu.exec_(QtCore.QPoint(posX, posY))
if action is not None:
self.proxy.setFilterKeyColumn(logicalIndex)
self.proxy.filter_value = action.data()
def lineEdit_textChanged(self):
search = QtCore.QRegExp(
self.lineEdit.text(), QtCore.Qt.CaseInsensitive, QtCore.QRegExp.RegExp
)
self.proxy.setFilterKeyColumn(self.comboBox.currentIndex())
self.proxy.setFilterRegExp(search)
def edit_items(self):
if not self.model.rowCount():
return
index = self.tableView.currentIndex()
if index.isValid():
row = index.row()
else:
row = 0
name_line = QtWidgets.QLineEdit(readOnly=True)
age_edit = QtWidgets.QSpinBox()
gender_combo = QtWidgets.QComboBox()
genders = "M", "F"
gender_combo.addItems(genders)
date_of_birth = QtWidgets.QDateEdit()
date_of_birth.setDisplayFormat("d-MMM-yyyy")
updateButton = QtWidgets.QPushButton("Update")
mapper = QtWidgets.QDataWidgetMapper()
mapper.setSubmitPolicy(QtWidgets.QDataWidgetMapper.ManualSubmit)
mapper.setModel(self.tableView.model())
mapper.addMapping(name_line, 0)
mapper.addMapping(age_edit, 1)
mapper.addMapping(gender_combo, 2)
mapper.addMapping(date_of_birth, 3)
mapper.setCurrentIndex(row)
dialog = QtWidgets.QDialog()
dialog.setWindowTitle("Edit Window")
layout = QtWidgets.QVBoxLayout(dialog)
formLayout = QtWidgets.QFormLayout()
layout.addLayout(formLayout)
formLayout.addRow("Name", name_line)
formLayout.addRow("Age", age_edit)
formLayout.addRow("Gender", gender_combo)
formLayout.addRow("Date of Birth", date_of_birth)
layout.addWidget(updateButton)
updateButton.clicked.connect(dialog.accept)
if dialog.exec_():
mapper.submit()
def refresh_table(self):
print("refresh")
def main():
app = QtWidgets.QApplication(sys.argv)
w = UI()
w.show()
sys.exit(app.exec_())
if __name__ == "__main__":
main()
我正在尝试使用 QDataWidgetMapper() 编辑来自 Qsqltablemodel 的行数据。日期列在我的数据库 table 中是文本格式，我想使用日期格式为“d-MMM-yyyy”。当我尝试编辑该行时，日期列将默认日期格式设置为“1-1-2000”。
这该怎么做？
下面是示例图片：
默认情况下，QtSql 可以处理具有特定格式的字符串列，例如 QDate 和 QDateTime（如 the sqlite docs 中所示），但在这种情况下它不符合这些格式，因此 Qt 不知道如何解释它们并将它们显示为文本。因此，您必须使用委托将该文本转换为 QDate，反之亦然：
class ItemDelegate(QtWidgets.QItemDelegate):
def setEditorData(self, editor, index):
if index.column() == 3 and isinstance(editor, QtWidgets.QDateEdit):
text = index.data()
date = QtCore.QDate.fromString(text, "d-MMM-yyyy")
editor.setDate(date)
return
super().setEditorData(editor, index)
def setModelData(self, editor, model, index):
if index.column() == 3 and isinstance(editor, QtWidgets.QDateEdit):
text = editor.date().toString("d-MMM-yyyy")
model.setData(index, text)
return
super().setModelData(editor, model, index)
# ...
mapper = QtWidgets.QDataWidgetMapper()
delegate = ItemDelegate(mapper)
mapper.setItemDelegate(delegate)
# ...