How to display results of SQLalchemy query correctly in Flask Jinja templates












0















I am having trouble displaying the results of a SQLAlchemy query correctly in a Jinja template page.



I am basing my project on Formula 1 Drivers and the Teams that they drive for. I have a page which lists the Teams in F1 and it should list the Drivers who race for each individual team (Many-to-Many relationship between Driver and Team classes).



The output I receive is correct, however it appears to be grouped together in a list type output. I would like the drivers for each team to be listed independently as strings rather than a list grouped together.



Here is my code:



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 (only for specific route)



@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 %}


Here is the output I get from the webpage



screenshot of webpage output



What I would like is the page to display the relevant drivers, but separately, without the [ ] brackets.



Can anyone help with where I am going wrong?



Many thanks.










share|improve this question























  • I think the Team.driver (per backref) is a tomany relationship so it renders as an array with . You can remove the brackets() with a join, eg. ','.join(driver) . Also, I think you should rename "details" to "teams".

    – Tohmaxxx
    Nov 21 '18 at 14:46
















0















I am having trouble displaying the results of a SQLAlchemy query correctly in a Jinja template page.



I am basing my project on Formula 1 Drivers and the Teams that they drive for. I have a page which lists the Teams in F1 and it should list the Drivers who race for each individual team (Many-to-Many relationship between Driver and Team classes).



The output I receive is correct, however it appears to be grouped together in a list type output. I would like the drivers for each team to be listed independently as strings rather than a list grouped together.



Here is my code:



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 (only for specific route)



@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 %}


Here is the output I get from the webpage



screenshot of webpage output



What I would like is the page to display the relevant drivers, but separately, without the [ ] brackets.



Can anyone help with where I am going wrong?



Many thanks.










share|improve this question























  • I think the Team.driver (per backref) is a tomany relationship so it renders as an array with . You can remove the brackets() with a join, eg. ','.join(driver) . Also, I think you should rename "details" to "teams".

    – Tohmaxxx
    Nov 21 '18 at 14:46














0












0








0








I am having trouble displaying the results of a SQLAlchemy query correctly in a Jinja template page.



I am basing my project on Formula 1 Drivers and the Teams that they drive for. I have a page which lists the Teams in F1 and it should list the Drivers who race for each individual team (Many-to-Many relationship between Driver and Team classes).



The output I receive is correct, however it appears to be grouped together in a list type output. I would like the drivers for each team to be listed independently as strings rather than a list grouped together.



Here is my code:



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 (only for specific route)



@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 %}


Here is the output I get from the webpage



screenshot of webpage output



What I would like is the page to display the relevant drivers, but separately, without the [ ] brackets.



Can anyone help with where I am going wrong?



Many thanks.










share|improve this question














I am having trouble displaying the results of a SQLAlchemy query correctly in a Jinja template page.



I am basing my project on Formula 1 Drivers and the Teams that they drive for. I have a page which lists the Teams in F1 and it should list the Drivers who race for each individual team (Many-to-Many relationship between Driver and Team classes).



The output I receive is correct, however it appears to be grouped together in a list type output. I would like the drivers for each team to be listed independently as strings rather than a list grouped together.



Here is my code:



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 (only for specific route)



@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 %}


Here is the output I get from the webpage



screenshot of webpage output



What I would like is the page to display the relevant drivers, but separately, without the [ ] brackets.



Can anyone help with where I am going wrong?



Many thanks.







python flask jinja2 flask-sqlalchemy






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asked Nov 21 '18 at 14:11









kdouglakdougla

32




32













  • I think the Team.driver (per backref) is a tomany relationship so it renders as an array with . You can remove the brackets() with a join, eg. ','.join(driver) . Also, I think you should rename "details" to "teams".

    – Tohmaxxx
    Nov 21 '18 at 14:46



















  • I think the Team.driver (per backref) is a tomany relationship so it renders as an array with . You can remove the brackets() with a join, eg. ','.join(driver) . Also, I think you should rename "details" to "teams".

    – Tohmaxxx
    Nov 21 '18 at 14:46

















I think the Team.driver (per backref) is a tomany relationship so it renders as an array with . You can remove the brackets() with a join, eg. ','.join(driver) . Also, I think you should rename "details" to "teams".

– Tohmaxxx
Nov 21 '18 at 14:46





I think the Team.driver (per backref) is a tomany relationship so it renders as an array with . You can remove the brackets() with a join, eg. ','.join(driver) . Also, I think you should rename "details" to "teams".

– Tohmaxxx
Nov 21 '18 at 14:46












1 Answer
1






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oldest

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0














Since d.driver is a list of drivers, you should print each item of the list separately, because if you print a list of something, it will also include the brackets.



{% 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 %}





share|improve this answer
























  • Perfect, that did the job brilliantly. Thanks very much!

    – kdougla
    Nov 22 '18 at 8:23











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1 Answer
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1 Answer
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active

oldest

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oldest

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active

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0














Since d.driver is a list of drivers, you should print each item of the list separately, because if you print a list of something, it will also include the brackets.



{% 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 %}





share|improve this answer
























  • Perfect, that did the job brilliantly. Thanks very much!

    – kdougla
    Nov 22 '18 at 8:23
















0














Since d.driver is a list of drivers, you should print each item of the list separately, because if you print a list of something, it will also include the brackets.



{% 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 %}





share|improve this answer
























  • Perfect, that did the job brilliantly. Thanks very much!

    – kdougla
    Nov 22 '18 at 8:23














0












0








0







Since d.driver is a list of drivers, you should print each item of the list separately, because if you print a list of something, it will also include the brackets.



{% 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 %}





share|improve this answer













Since d.driver is a list of drivers, you should print each item of the list separately, because if you print a list of something, it will also include the brackets.



{% 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 %}






share|improve this answer












share|improve this answer



share|improve this answer










answered Nov 21 '18 at 15:05









JoostJoost

2,0971417




2,0971417













  • Perfect, that did the job brilliantly. Thanks very much!

    – kdougla
    Nov 22 '18 at 8:23



















  • Perfect, that did the job brilliantly. Thanks very much!

    – kdougla
    Nov 22 '18 at 8:23

















Perfect, that did the job brilliantly. Thanks very much!

– kdougla
Nov 22 '18 at 8:23





Perfect, that did the job brilliantly. Thanks very much!

– kdougla
Nov 22 '18 at 8:23




















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