Python/PyQT QString无法插入MySQL数据库

Question

我正在尝试通过一个叫做QLineEdit的控件从用户那里获取一些值。当用户点击一个QPushButton按钮时，我想从所有的QLineEdit控件中获取文本，并把这些文本存储到本地的MySQL数据库中。但是，当我在插入数据的语句中使用字符串替换时，值没有被替换。以下是我的SQL语句：

sql = 'INSERT INTO jobs (incident_id, organization, organization_poc, media_type) VALUES ("%s", "%s", "%s", "%s")' % (self.edi_IncidentID.text(), self.edi_OrganizationAffected.text(), self.edi_OrganizationContact.text(), self.edi_MediaType.text())

所有的self.edi_xxx变量都是QLineEdit控件。当按钮被按下时，会触发以下操作：

self.connect(btn_Submit, QtCore.SIGNAL('clicked()'), self.submitForm)

这个提交操作只是创建一个数据库对象，并把值写入数据库。不过，为了调试，我打印出了构建的SQL语句，结果是：INSERT INTO jobs (incident_id, organization, organization_poc, media_type) VALUES ("", "", "", "")。

我还尝试使用str()函数将QString转换为字符串，但结果还是一样。

任何帮助都将非常感激 :)?

L

编辑：这是完整的代码，去掉了导入部分：

class Database():
def __init__(self):
   self.db_host = "localhost"
   self.db_user = "***********"
   self.db_pass = "***********"
   self.db_name = "incidents"

def openConn(self):
   self.db = MySQLdb.connect(self.db_host, self.db_user, self.db_pass, self.db_name)

def closeConn(self):
   self.db.close()

def writeValues(self, sql):
   self.openConn()
   self.cursor = self.db.cursor()
   self.cursor.execute(sql)
   self.cursor.fetchone()
   self.closeConn()

class NewIncidentForm(QtGui.QWidget):
def __init__(self, parent=None):
    QtGui.QWidget.__init__(self, parent)

    self.setWindowTitle('New Incident')

    lbl_IncidentID = QtGui.QLabel('Incident ID:')
    lbl_MediaType = QtGui.QLabel('Media Type:')
    lbl_OrganizationAffected = QtGui.QLabel('Organization Affected:')
    lbl_OrganizationContact = QtGui.QLabel('Organization Point of Contact: ')

    self.edi_IncidentID = QtGui.QLineEdit()
    self.edi_MediaType = QtGui.QLineEdit()
    self.edi_OrganizationAffected = QtGui.QLineEdit()
    self.edi_OrganizationContact = QtGui.QLineEdit()


    btn_Submit = QtGui.QPushButton('Submit')

    grid = QtGui.QGridLayout()
    grid.setSpacing(10)

    grid.addWidget(lbl_IncidentID, 1, 0)
    grid.addWidget(self.edi_IncidentID, 1, 1)

    grid.addWidget(lbl_MediaType, 3, 0)
    grid.addWidget(self.edi_MediaType, 3, 1)

    grid.addWidget(lbl_OrganizationAffected, 4, 0)
    grid.addWidget(self.edi_OrganizationAffected, 4, 1)

    grid.addWidget(lbl_OrganizationContact, 5, 0)
    grid.addWidget(self.edi_OrganizationContact, 5, 1)

    grid.addWidget(btn_Submit, 15, 0)

    self.sql = 'INSERT INTO jobs (incident_id, organization, organization_poc, media_type) VALUES ("%s", "%s", "%s", "%s")' % (self.edi_IncidentID.text(), self.edi_OrganizationAffected.text(), self.edi_OrganizationContact.text(), self.edi_MediaType.text())
    self.connect(btn_Submit, QtCore.SIGNAL('clicked()'), self.submitForm)        

    self.setLayout(grid)
    self.resize(350, 300)

def submitForm(self):
    db = Database()
    db.writeValues(self.sql)

app = QtGui.QApplication(sys.argv)
qb = NewIncidentForm()
qb.show()
sys.exit(app.exec_())

mysql 字符串替换调试数据库操作 qlineedit qt sql语句 qt控件

Python/PyQT QString无法插入MySQL数据库

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