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added error handling for DB exceptions

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This commit is contained in:
Damien De Paoli
2020-12-30 22:21:29 +11:00
parent db18edeef3
commit 60b7484afb
1 changed files with 24 additions and 13 deletions
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37
genre.py
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@@ -3,6 +3,7 @@ from flask import request, render_template, redirect
from flask_wtf import FlaskForm
from __main__ import db, app, ma
from sqlalchemy import func, Sequence
from sqlalchemy.exc import SQLAlchemyError
from status import st, Status
################################################################################
@@ -50,10 +51,15 @@ def new_genre():
return render_template("edit_id_name.html", form=form, page_title='Create new Genre' )
else:
genre = Genre( name=request.form["name"] )
db.session.add(genre)
db.session.commit()
st.SetMessage( "Created new Genre (id={})".format(genre.id) )
return redirect( '/genres' )
try:
db.session.add(genre)
db.session.commit()
st.SetMessage( "Created new Genre (id={})".format(genre.id) )
return redirect( '/genres' )
except SQLAlchemyError as e:
st.SetAlert( "danger" )
st.SetMessage( "<b>Failed to add Genre:</b>&nbsp;{}".format( e.orig) )
return render_template("edit_id_name.html", form=form, page_title='Create new Genre', alert=st.GetAlert(), message=st.GetMessage() )
################################################################################
# /genre/<id> -> GET/POST(save or delete) -> shows/edits/delets a single genre
@@ -63,15 +69,20 @@ def genre(id):
### DDP: should this be request.form or request.values?
form = GenreForm(request.form)
if request.method == 'POST' and form.validate():
genre = Genre.query.get(id)
if 'delete' in request.form:
st.SetMessage("Successfully deleted (id={}, name={})".format( genre.id, genre.name ) )
genre = Genre.query.filter(Genre.id==id).delete()
if 'submit' in request.form:
st.SetMessage("Successfully Updated Genre (id={})".format(id) )
genre.name = request.form['name']
db.session.commit()
return redirect( '/genres' )
try:
genre = Genre.query.get(id)
if 'delete' in request.form:
st.SetMessage("Successfully deleted (id={}, name={})".format( genre.id, genre.name ) )
genre = Genre.query.filter(Genre.id==id).delete()
if 'submit' in request.form:
st.SetMessage("Successfully Updated Genre (id={})".format(id) )
genre.name = request.form['name']
db.session.commit()
return redirect( '/genres' )
except SQLAlchemyError as e:
st.SetAlert( "danger" )
st.SetMessage( "<b>Failed to modity Genre:</b>&nbsp;{}".format(e.orig) )
return render_template("edit_id_name.html", form=form, page_title='Edit Genre', alert=st.GetAlert(), message=st.GetMessage() )
else:
genre = Genre.query.get(id)
form = GenreForm(request.values, obj=genre)