我遇到了一个看似简单的使用Flask的sqlalchemy查询的问题。Flask-SQLAlchemy查询
我有一张名为Links的表格,并且在该表格中有一列称为'id','author_id','link'和'group'的列。我的models.py如下所示:
class Links(db.Model):
__tablename__='links'
id = db.Column(db.Integer, primary_key=True)
author_id = db.Column(db.Integer, db.ForeignKey('users.id'))
link = db.Column(db.String, unique=False, nullable=True)
group = db.Column(db.String, unique=False, nullable=False)
def __init__(self, author_id=None, link=None, group=None):
self.author_id = author_id
self.link = link
self.group = group
def __repr__(self):
return'<Link %r>' %(self.link)
我想返回与登录到应用程序的用户关联的所有组的值。这里是我的views.py文件:
@app.route('/members/', methods=['GET','POST'])
@login_required
def members():
error=None
form = PostLink(request.form, csrf_enabled = False)
uid = session['user_id']
link = "NULL"
groups = Links.query.filter_by(author_id=uid).all()
if request.method=='POST':
if form.validate_on_submit():
new_group = Links(
uid,
form.group.data,
link,
)
try:
db.session.add(new_group)
db.session.commit()
flash("You have created a group!")
except IntegrityError:
error = 'That group did not work, maybe it already exists?'
else:
flash_errors(form)
return render_template('members.html', form=form, error=error, link = link, groups=groups)
而我的 'members.html':
{% extends "base.html" %}
{%块含量%}
<p>Add New Group: {{ form.group }}</p>
<input id="link" type="hidden" name="link" value= {{ link }}/>
<p><input type="submit" value="Request"></p>
</form>
<br/>
{% for group in groups %}
<li><p>
{{ group }}
</p></li>
{% endfor %}
{% endblock %}
目前这只是一个返回链接和组以奇数格式列表:
<Link u'link2'>
<Link u'linky'>
<Link u'linkymaybe'>
<Link u'madeit'>
<Link u'BLAH'>
所以我的问题的核心是如何使用SQLAlchemy建立查询来显示与登录用户相关联的所有组(uid = session ['user_id'])我对Flask来说很新颖,这个问题正在成为一个问题,因为我尝试了一些filter_by和filter语句,但都没有运气。
预先感谢您!
谢谢!这很好。还有一个问题。我如何过滤输出以显示没有重复的组? – jmbmxer