Question

我在Jinja模板页面中无法正确显示SQLAlchemy查询的结果。

我的项目基于一级方程式车手和他们所驾驶的车队。我有一个页面，列出了F1中的车队，并且应该列出每个车队参赛的车手（车手和车队之间的多对多关系）。

我收到的输出是正确的，但是它似乎在列表类型的输出中分组在一起。我希望每个团队的驱动程序都以字符串的形式单独列出，而不是分组在一起的列表。

这是我的代码：

models.py

from datetime import datetime
from app import db


class Team_driver(db.Model):
    # Many-to-many relationship table between Driver and Team
    __tablename__ = "team_driver"
    id = db.Column(db.Integer, primary_key=True)
    team_id = db.Column(db.Integer, db.ForeignKey('team.id'), nullable=False)
    driver_id = db.Column(db.Integer, db.ForeignKey('driver.id'), nullable=False)


class Team(db.Model):
    __tablename__ = "team"
    id = db.Column(db.Integer, primary_key=True)
    teamName = db.Column(db.String(64))
    nationality = db.Column(db.String(64))
    # relationship between Team table and Driver table, reference 'team' in forms
    drivers = db.relationship('Driver', secondary="team_driver", backref='team')

    def __repr__(self):
        # specify variables to return to web page from backref
        return '{}'.format(self.teamName)


class Driver(db.Model):
    __tablename__ = "driver"
    id = db.Column(db.Integer, primary_key=True)
    firstName = db.Column(db.String(64))
    lastName = db.Column(db.String(64))
    raceNum = db.Column(db.Integer)
    nationality = db.Column(db.String(64))
    # relationship between Driver table and Team table, reference 'driver' in forms
    teams = db.relationship('Team', secondary="team_driver", backref='driver')

    def __repr__(self):
        # specify variables to return to web page from backref
        return '{} {}'.format(self.firstName,self.lastName)

routes.py（仅适用于特定路由）

@app.route('/teamDetails', methods=['GET', 'POST'])
def teamDetails():
    details = Team.query.all()
    return render_template('teamDetails.html',  title='Team Details', details=details)

driverDetails.html

<!-- teamDetails.html -->

<!-- all other html files must now extend index.html and not base.html -->
{% extends "index.html" %}

{% block content %}
    <h1>Team Details</h1>
    {% for d in details %}
    <div><p>Team Name: {{ d.teamName }}<br>Nationality: {{ d.nationality }}
    <br>Drivers: {{ d.driver }}</p></div>
    {% endfor %}
{% endblock %}

这是我从网页上获得的输出

screenshot of webpage output

我想要的是显示相关驱动程序的页面，但要单独显示，没有[]括号。

任何人都可以帮助我解决问题吗？

非常感谢。

Answer 1

由于d.driver是驱动程序列表，因此您应该分别打印列表的每个项目，因为如果您打印某些内容的列表，那么它还将包括方括号。

{% block content %}
<h1>Team Details</h1>
{% for d in details %}
  <div><p>Team Name: {{ d.teamName }}<br>Nationality: {{ d.nationality }}
  <br>Drivers: 
  {% for driver in d.drivers %}
    {{ driver }} 
  {% endfor %}
  </p></div>
{% endfor %}
{% endblock %}

如何在Flask Jinja模板中正确显示SQLalchemy查询的结果

1 个答案: