sqlite

问题 I'm really at a loss because this makes no sense at all. I call save/create an object, and it dosn't show up in the admin site. I even checked the SQLite database with a SQLite Viewer program, which again showed that the item had not been saved. This is the code that saves the Data object: data = Data(represents=field, for_entry=entry, value="This can be anything") # field is a DataField db object and entry is a Entry db object (see model below and paragraph) print("B4", data) #<---- Shows

问题 I'm trying to share a sqlite3 database between one writer process, and one reader process. However, it does not work, and it seems to me that nothing is being written in example.db. reader.py import sqlite3 from time import sleep conn = sqlite3.connect('example.db', isolation_level=None) c = conn.cursor() while True: c.execute("SELECT * FROM statistics") try: print '**' print c.fetchone() except: pass sleep(3) writer.py import sqlite3 from time import sleep import os if os.path.exists(

问题 I get the above error for executing the below INSERT-statement. The database file ce.db is in the same directory as my code and I have successfully created the tables therein. My sqlite version is 2.8.17 and I am confident that my db file exists as I can see it in my directory and have succeeded in creating tables therein. import sqlite3 @app.route("/sign_up", methods=["GET", "POST"]) def sign_up(): # [..other code..] conn = sqlite3.connect("ce.db") c = conn.cursor() result = c.execute(

问题 I am trying to build and app with flask, I have seen some tutorial and books and some code[1] they explain how to declare integers and string for the database setup. However, they do not explain how to store images. I am very confused now I though the natural way to store images was on a database, but reading some documentation on the flask site[2] the filesystem is the place to store images. I just make a first assumption reading a flask development book that a declaration with largeBinary

问题 Hi I am building a web application using Flask and Sqlite3. I had issues with connecting the database for a while and it did not work when I wrote this: #version 1 app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////C:/Users/Giang/PyCharmProjects/FlaskWebBlog/FlaskWebBlog/site.db' Python gave me operational error: can not open database because I wrote with 4 slashes after the colon. After reading sqlalchemy documentation and doing so many trials, I found out this worked: #with 3 slashes,

问题 My application uses a database stored in a file available via network. So far, I've been using a MS-Access file (.accdb), but I'm trying to migrate to SQLite Version 3 (.db3) . I added SQLite NuGet package to my project and created a SQLite database using SQLiteStudio. I refactored my database objects to work with System.Data.SQLite.SQLiteConnection instead of System.Data.OleDb.OleDbConnection and it worked well. However, my previous accdb database was password protected, and I don't know how

问题 Unfortunatelly, the documentation completely lacks examples (what is really strange), as if it assumes all its readers to be good programmers. Whereas, I'm quite new to C++ and can not really figure out from the documentation how to really prepare and execute statements. I love the way how it is implemented in PDO for PHP . Normally, I just do it like this: $s = $db->prepare("SELECT id FROM mytable WHERE id = :id"); $s->bindParam(':id', $id); $s->execute(); or do it using ? tokens: $data =

问题 I am able to update the tKinter entry widgets boxes using textvariables... the issue is that it add brackets '{}' in my desired data... def showRecord(self): connection = sqlite3.connect("../employee.db") connection.text_factory = sqlite3.OptimizedUnicode cursor = connection.cursor () cursor.execute ( '''SELECT "Scheduled Shift" FROM employee_details WHERE Ecode = "5568328"''' ) items = cursor.fetchall () self.Employee1_FirstDay_ActualShift.set(items[0]) self.Employee1_SecondDay_ActualShift

问题 I am able to update the tKinter entry widgets boxes using textvariables... the issue is that it add brackets '{}' in my desired data... def showRecord(self): connection = sqlite3.connect("../employee.db") connection.text_factory = sqlite3.OptimizedUnicode cursor = connection.cursor () cursor.execute ( '''SELECT "Scheduled Shift" FROM employee_details WHERE Ecode = "5568328"''' ) items = cursor.fetchall () self.Employee1_FirstDay_ActualShift.set(items[0]) self.Employee1_SecondDay_ActualShift

问题 I am able to update the tKinter entry widgets boxes using textvariables... the issue is that it add brackets '{}' in my desired data... def showRecord(self): connection = sqlite3.connect("../employee.db") connection.text_factory = sqlite3.OptimizedUnicode cursor = connection.cursor () cursor.execute ( '''SELECT "Scheduled Shift" FROM employee_details WHERE Ecode = "5568328"''' ) items = cursor.fetchall () self.Employee1_FirstDay_ActualShift.set(items[0]) self.Employee1_SecondDay_ActualShift