flask/sqlalchemy-OperationalError:(sqlite3.OperationalError)没有这样的表 [英] flask/sqlalchemy - OperationalError: (sqlite3.OperationalError) no such table

问题描述

我收到以下错误:

sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) no such table: s_amodel [SQL: 'INSERT INTO s_amodel

我的文件forms.py

从flask_wtf导入表中的

My files forms.py

from flask_wtf import Form
class SAForm(Form):

---

models.py

来自app.app_and_db的

---

models.py

from app.app_and_db import db 

class SAmodel(db.Model):
    id = db.Column(db.Integer(), primary_key=True)

views.py

来自app.app_and_db导入应用程序的

views.py

from app.app_and_db import app, db
from app.sa.forms import SAForm
from app.sa.models import SAmodel

@sa_blueprint.route('/sa/new', methods=['GET','POST'])
def new_sa():

        form = SAForm(request.form, SAmodel)

        if request.method=='POST' and form.validate():
            model = SAmodel()
            form.populate_obj(model)
            db.session.add(model)
            db.session.commit()
            return redirect(url_for("sa.home_page"))
        return render_template("new_sa.html", form=form)

config.py

SQLALCHEMY_DATABASE_URI = os.getenv('DATABASE_URL', 'sqlite:///app.sqlite')

这就是我所拥有的.app.sqlite已创建，但为0字节.当我使用new_sa()函数提交内容时，出现上述错误.还有如何获得表名"s_amodel"?

This is what I have. The app.sqlite is created but it is 0 bytes. When I submit something using new_sa() function, I get the above error. Also how is it getting the table name "s_amodel"?

任何帮助将不胜感激.非常感谢！

Any help would be greatly appreciated. Thanks a lot!

推荐答案

您应该首先初始化/创建表.请阅读Flask官方文档中的 创建数据库一文.:

You're supposed to initialize/create the tables first. Please read the Creating the Database article in the official Flask documentation:

此类系统需要一个架构来告诉他们如何存储该信息.因此，在首次启动服务器之前，创建该架构很重要.

Such systems need a schema that tells them how to store that information. So before starting the server for the first time it’s important to create that schema.

这是Flask使用模式SQL脚本创建数据库，表等的示例:

Here's Flask's example of using a schema SQL script to create the database, tables, etc:

sqlite3 /tmp/flaskr.db < schema.sql

推荐的方法是在应用程序中使用 db.create_all().例如，请参阅: https://github.com/lily-mayfield/staticfuzz/blob/d2e54186f5639a06a5a796f0499a984ca8919ed7/staticfuzz.py#L403

The recommended way is to use db.create_all() within your app. For example, see: https://github.com/lily-mayfield/staticfuzz/blob/d2e54186f5639a06a5a796f0499a984ca8919ed7/staticfuzz.py#L403

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