我有一个简单的表单,其中包含一个comboBox和一个按钮'Save'。
组合框的下拉列表显示:'选择颜色','红色','绿色','蓝色'。
“保存”按钮将组合框上的用户选择保存到基础表“ tbl_palette”中。
我还有一个查找表'tlkp_colors',其中包含颜色及其相应ID的列表。我使用此查找表填充组合框。
此过度简化的示例的完整代码如下所示(可以按原样运行):
import sys
import os.path
import sqlite3
######### Qt DESIGNER AUTO GENERATED CODE ##########
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(407, 240)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.comboBox = QtWidgets.QComboBox(self.centralwidget)
self.comboBox.setGeometry(QtCore.QRect(100, 60, 201, 22))
self.comboBox.setObjectName("comboBox")
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(150, 130, 101, 28))
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 407, 26))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton.setText(_translate("MainWindow", "Save"))
######### END OF AUTO GENERATED CODE ###############
DIR_PATH = os.path.dirname(os.path.abspath(__file__))
DB_NAME = 'test.db'
target_db = os.path.join(DIR_PATH, DB_NAME)
class Database:
def __init__(self):
# create database 'test.db', add schema, then close it
cnn = sqlite3.connect(target_db)
c = cnn.cursor()
c.executescript("""
DROP TABLE IF EXISTS tlkp_colors;
CREATE TABLE tlkp_colors
(
color_id INTEGER PRIMARY KEY,
color_name TEXT
);
DROP TABLE IF EXISTS tbl_palette;
CREATE TABLE tbl_palette
(
id INTEGER PRIMARY KEY AUTOINCREMENT,
color NUMBER
);
INSERT INTO tlkp_colors VALUES (0, 'Choose color');
INSERT INTO tlkp_colors VALUES (10, 'Red');
INSERT INTO tlkp_colors VALUES (20, 'Green');
INSERT INTO tlkp_colors VALUES (30, 'Blue');
""")
cnn.commit()
cnn.close()
def save(self, your_choice):
data_tuple = (your_choice,)
sqlite_insert_query = """INSERT INTO tbl_palette (color) VALUES (?)"""
db = sqlite3.connect(target_db)
c = db.cursor()
c.execute(sqlite_insert_query, data_tuple )
db.commit()
db.close()
def close_db(self):
target_db.close()
def populate_cbo_from_tlkp_table():
cnn = sqlite3.connect(target_db)
c = cnn.cursor()
c.execute("SELECT color_name FROM tlkp_colors")
list_of_strings = [item[0] for item in c.fetchall()]
cnn.commit()
cnn.close()
return list_of_strings
# comment the following line after the first run (db created already)
db = Database() # create a new instance Database
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
ui.comboBox.addItems(populate_cbo_from_tlkp_table())
ui.pushButton.clicked.connect(lambda : db.save(ui.comboBox.currentIndex()))
MainWindow.show()
sys.exit(app.exec_())
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
[当我单击“保存”按钮时,我希望将颜色的ID保存在基础表tbl_palette中,而不是颜色本身,即我希望将“ 10”而不是“红色”保存。
如果您可以更改代码来做到这一点,我将非常感激。请不要给我一般性的指示,这就是为什么我创建了这个简单的示例并发布了完整的代码的原因。我已经在网上搜索过,但到目前为止,没有任何东西可以帮助我解决问题。我是Qt Designer的新手,似乎丢失了一些东西。
提前感谢
我根据ekhumoro的建议更改了代码:
我已替换
def populate_cbo_from_tlkp_table():
cnn = sqlite3.connect(target_db)
c = cnn.cursor()
c.execute("SELECT color_name FROM tlkp_colors")
list_of_strings = [item[0] for item in c.fetchall()]
cnn.commit()
cnn.close()
return list_of_strings
with
def populate_cbo_from_tlkp_table():
cnn = sqlite3.connect(target_db)
c = cnn.cursor()
c.execute("SELECT color_name, color_id FROM tlkp_colors")
rows = c.fetchall()
for row in rows:
ui.comboBox.addItem(str(row[0]), row[1])
print(row)
cnn.commit()
cnn.close()
和
ui.comboBox.addItems(populate_cbo_from_tlkp_table())
ui.pushButton.clicked.connect(lambda : db.save(ui.comboBox.currentIndex()))
with
populate_cbo_from_tlkp_table()
ui.pushButton.clicked.connect(lambda : db.save(ui.comboBox.currentData()))
现在它完全按照我想要的去做。