Python/PyQT QString不会插入到MySQL数据库中

Question

我尝试使用QLineEdit小部件从用户检索一些值。当QPushButton引发一个clicked事件时，我希望从所有QLineEdit小部件中检索文本并存储在本地MySQL数据库中。但是，当我试图在insert语句中使用string substation时，这些值不会被替换。下面是我的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self.edi_xxx公司变量只是QLineEdit小部件。当按下按钮时，会触发以下命令：

^{pr2}$

submit只需创建一个数据库对象并将值写入数据库。但是，为了调试，我打印出构建的SQL语句，结果如下： 插入作业（事件标识、组织、组织、poc、介质类型）值（“，”“，”“，”“”）。在

我也尝试过使用str（）函数将一个QString转换为一个字符串，但是发生了同样的事情。在

任何帮助都将不胜感激：）？在

我

编辑：以下是减去导入的完整代码：

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_())

Answer 1

该程序缺少的另一部分是commit（）函数，该函数用于存储数据或在脚本请求时自动提交（true）

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

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

Answer 2

原因很简单：

在自我.sql应该在里面 定义提交格式（自身）：

不在 definit（self，parent=None）：

因为其他人是空的！在

Answer 3

：天 QString有__str__函数，请尝试以下操作：

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

添加了''.join()

或者QString有toUtf8（）

因此，将self.edi_IncidentIS.text()改为：

^{pr2}$

整个说明：

self.sql = 'INSERT INTO jobs (incident_id, organization, organization_poc, media_type) VALUES ("%s", "%s", "%s", "%s")' % (self.edi_IncidentID.text().toUtf8(), self.edi_OrganizationAffected.text().toUtf8(), self.edi_OrganizationContact.text().toUtf8(), self.edi_MediaType.text().toUtf8())