105 lines
5.1 KiB
Python
105 lines
5.1 KiB
Python
from wtforms import SubmitField, StringField, HiddenField, SelectField, validators
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from flask import request, render_template, redirect
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from flask_wtf import FlaskForm
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from main import db, app, ma
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from sqlalchemy import func, Sequence
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from sqlalchemy.exc import SQLAlchemyError
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from status import st, Status
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################################################################################
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# Class describing Genre in the database, and via sqlalchemy, connected to the DB as well
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################################################################################
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class Genre(db.Model):
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id = db.Column(db.Integer, db.Sequence('genre_id_seq'), primary_key=True )
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name = db.Column(db.String(50), unique=True, nullable=False)
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def __repr__(self):
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return "<id: {}, name: {}>".format(self.id,self.name)
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################################################################################
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# Helper class that inherits a .dump() method to turn class Genre into json / useful in jinja2
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################################################################################
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class GenreSchema(ma.SQLAlchemyAutoSchema):
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class Meta: model = Genre
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################################################################################
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# Helper class that defines a form for genre, used to make html <form>, with field validation (via wtforms)
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################################################################################
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class GenreForm(FlaskForm):
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id = HiddenField()
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name = StringField('Name:', [validators.DataRequired()])
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submit = SubmitField('Save' )
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delete = SubmitField('Delete' )
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################################################################################
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# Routes for genre data
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#
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# /genres -> GET only -> prints out list of all genres
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################################################################################
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@app.route("/genres", methods=["GET"])
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def genres():
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objects = Genre.query.order_by('id').all()
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return render_template("show_id_name.html", objects=objects, page_title='Show All Genres', url_base='genre', alert=st.GetAlert(), message=st.GetMessage() )
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################################################################################
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# /genre -> GET/POST -> creates a new genre type and when created, takes you back to /genres
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################################################################################
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@app.route("/genre", methods=["GET", "POST"])
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def new_genre():
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form = GenreForm(request.form)
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page_title='Create new Genre'
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if 'name' not in request.form:
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return render_template("edit_id_name.html", form=form, page_title=page_title )
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else:
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genre = Genre( name=request.form["name"] )
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try:
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db.session.add(genre)
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db.session.commit()
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st.SetMessage( "Created new Genre (id={})".format(genre.id) )
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return redirect( '/genres' )
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except SQLAlchemyError as e:
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st.SetAlert( "danger" )
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st.SetMessage( "<b>Failed to add Genre:</b> {}".format( e.orig) )
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return render_template("edit_id_name.html", form=form, page_title=page_title, alert=st.GetAlert(), message=st.GetMessage() )
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################################################################################
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# /genre/<id> -> GET/POST(save or delete) -> shows/edits/delets a single genre
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################################################################################
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@app.route("/genre/<id>", methods=["GET", "POST"])
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def genre(id):
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### DDP: should this be request.form or request.values?
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form = GenreForm(request.form)
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page_title='Edit Genre'
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if request.method == 'POST' and form.validate():
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try:
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genre = Genre.query.get(id)
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if 'delete' in request.form:
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st.SetMessage("Successfully deleted (id={}, name={})".format( genre.id, genre.name ) )
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genre = Genre.query.filter(Genre.id==id).delete()
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if 'submit' in request.form:
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st.SetMessage("Successfully Updated Genre (id={})".format(id) )
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genre.name = request.form['name']
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db.session.commit()
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return redirect( '/genres' )
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except SQLAlchemyError as e:
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st.SetAlert( "danger" )
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st.SetMessage( "<b>Failed to modify Genre:</b> {}".format(e.orig) )
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return render_template("edit_id_name.html", form=form, page_title=page_title, alert=st.GetAlert(), message=st.GetMessage() )
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else:
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genre = Genre.query.get(id)
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form = GenreForm(request.values, obj=genre)
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return render_template("edit_id_name.html", form=form, page_title=page_title )
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################################################################################
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# Gets the Genre matching id from DB, helper func in jinja2 code to show books
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################################################################################
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def GetGenreById(id):
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return Genre.query.get(id).name
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################################################################################
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# Gets the list of Genres, populates genre_list var in jinja2 code in book.html
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################################################################################
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def GetGenres():
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genres = Genre.query.order_by('name').all()
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return genres
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