191 lines
8.7 KiB
Python
191 lines
8.7 KiB
Python
from flask import Flask
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from flask import render_template
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from flask import request
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from flask_sqlalchemy import SQLAlchemy
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from flask_marshmallow import Marshmallow
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from author import AuthorForm
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from flask_bootstrap import Bootstrap
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DB_URL = 'postgresql+psycopg2://ddp:NWNlfa01@127.0.0.1:5432/library'
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app = Flask(__name__)
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app.config['SQLALCHEMY_DATABASE_URI'] = DB_URL
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app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
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### what is this value? I gather I should chagne it?
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app.config.from_mapping( SECRET_KEY=b'\xd6\x04\xbdj\xfe\xed$c\x1e@\xad\x0f\x13,@G')
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db = SQLAlchemy(app)
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ma = Marshmallow(app)
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Bootstrap(app)
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####################################### CLASSES / DB model #######################################
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book_author_link = db.Table('book_author_link', db.Model.metadata,
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db.Column('book_id', db.Integer, db.ForeignKey('book.id')),
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db.Column('author_id', db.Integer, db.ForeignKey('author.id'))
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)
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book_publisher_link = db.Table('book_publisher_link', db.Model.metadata,
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db.Column('book_id', db.Integer, db.ForeignKey('book.id')),
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db.Column('publisher_id', db.Integer, db.ForeignKey('publisher.id'))
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)
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book_genre_link = db.Table('book_genre_link', db.Model.metadata,
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db.Column('book_id', db.Integer, db.ForeignKey('book.id')),
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db.Column('genre_id', db.Integer, db.ForeignKey('genre_lst.id'))
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)
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class Book_Sub_Book_Link(db.Model):
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__tablename__ = "book_sub_book_link"
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book_id = db.Column(db.Integer, db.ForeignKey('book.id'), unique=True, nullable=False, primary_key=True)
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sub_book_id = db.Column(db.Integer, db.ForeignKey('book.id'), unique=True, nullable=False, primary_key=True)
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sub_book_num = db.Column(db.Integer)
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def __repr__(self):
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return "<book_id: {}, sub_book_id: {}, sub_book_num: {}>".format(self.book_id, self.sub_book_id, self.sub_book_num)
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class Book(db.Model):
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id = db.Column(db.Integer, unique=True, nullable=False, primary_key=True)
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title = db.Column(db.String(100), unique=True, nullable=False)
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year_published = db.Column(db.Integer)
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rating = db.Column(db.String(20))
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condition = db.Column(db.String(20))
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owned = db.Column(db.String(20))
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covertype = db.Column(db.String(20))
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notes = db.Column(db.Text)
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blurb = db.Column(db.Text)
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created = db.Column(db.Date)
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modified = db.Column(db.Date)
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author = db.relationship('Author', secondary=book_author_link)
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publisher = db.relationship('Publisher', secondary=book_publisher_link)
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genre = db.relationship('Genre_Lst', secondary=book_genre_link )
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parent_ref = db.relationship('Book_Sub_Book_Link', secondary=Book_Sub_Book_Link.__table__, primaryjoin="Book.id==Book_Sub_Book_Link.sub_book_id", secondaryjoin="Book.id==Book_Sub_Book_Link.book_id" )
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child_ref = db.relationship('Book_Sub_Book_Link', secondary=Book_Sub_Book_Link.__table__, primaryjoin="Book.id==Book_Sub_Book_Link.book_id", secondaryjoin="Book.id==Book_Sub_Book_Link.sub_book_id" )
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def __repr__(self):
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return "<id: {}, author: {}, title: {}, year_published: {}, rating: {}, condition: {}, owned: {}, covertype: {}, notes: {}, blurb: {}, created: {}, modified: {}, publisher: {}>".format(self.id, self.author, self.title, self.year_published, self.rating, self.condition, self.owned, self.covertype, self.notes, self.blurb, self.created, self.modified, self.publisher )
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class Author(db.Model):
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id = db.Column(db.Integer, unique=True, nullable=False, primary_key=True)
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firstnames = db.Column(db.String(50), unique=False, nullable=False)
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surname = db.Column(db.String(30), unique=False, nullable=False)
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def __repr__(self):
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return "<id: {}, firstnames: {}, surname: {}>".format(self.id,self.firstnames, self.surname)
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class Publisher(db.Model):
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id = db.Column(db.Integer, unique=True, nullable=False, primary_key=True)
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name = db.Column(db.String(50), unique=False, 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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class Genre_Lst(db.Model):
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__tablename__ = "genre_lst"
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id = db.Column(db.Integer, unique=True, nullable=False, primary_key=True)
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genre = db.Column(db.String(20), unique=False, nullable=False)
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def __repr__(self):
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return "<id: {}, genre: {}>".format(self.id, self.genre)
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### setup serializer schemas, to make returning books/authors easier
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class AuthorSchema(ma.SQLAlchemyAutoSchema):
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class Meta: model = Author
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class PublisherSchema(ma.SQLAlchemyAutoSchema):
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class Meta: model = Publisher
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class Genre_LstSchema(ma.SQLAlchemyAutoSchema):
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class Meta: model = Genre_Lst
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class Book_Sub_Book_LinkSchema(ma.SQLAlchemyAutoSchema):
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class Meta: model = Book_Sub_Book_Link
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class BookSchema(ma.SQLAlchemyAutoSchema):
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author = ma.Nested(AuthorSchema, many=True)
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publisher = ma.Nested(PublisherSchema, many=True)
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genre = ma.Nested(Genre_LstSchema, many=True)
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parent_ref = ma.Nested(Book_Sub_Book_LinkSchema, many=True)
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child_ref = ma.Nested(Book_Sub_Book_LinkSchema, many=True)
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class Meta: model = Book
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### DDP: do I need many=True on Author as books have many authors? (or in BookSchema declaration above?)
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book_schema = BookSchema()
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books_schema = BookSchema(many=True)
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####################################### ROUTES #######################################
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@app.route("/books", methods=["GET"])
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def books():
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books = Book.query.outerjoin(Book_Sub_Book_Link, Book.id==Book_Sub_Book_Link.book_id).order_by(Book.id, Book_Sub_Book_Link.sub_book_num).all()
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subs = db.engine.execute ( "select * from book_sub_book_link" )
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for row in subs:
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index = next((i for i, item in enumerate(books) if item.id == row.sub_book_id), -1)
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books[index].parent_id = row.book_id
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books[index].sub_book_num = row.sub_book_num
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books_s = books_schema.dump(books)
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return render_template("books.html", books=books, tst=books_s)
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# return render_template("books.html", books=books_s)
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@app.route("/book/<id>", methods=["GET"])
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def book(id):
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book = Book.query.get(id)
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book_s = book_schema.dump(book)
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######
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###
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### okay, this manual hacking of sub_book is currently going to be needed, because in the jinja2 I want to list the book, and more than just the id numhber of the sub_book, I want the details... (sub_book_schema needs a book relationship BUT, dependencies mean I can't define a book schema inside sub_book schema, and I am definitely not sure how to join it anyway... for another time.
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###
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#####
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# force sub books for jinja2 to be able to use
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subs = db.engine.execute ( "select bsb.book_id, bsb.sub_book_id, bsb.sub_book_num, book.title, book.rating, book.year_published, book.notes, bal.author_id as author_id, author.surname||', '||author.firstnames as author from book_sub_book_link bsb, book, book_author_link bal, author where bsb.book_id = {} and book.id = bsb.sub_book_id and book.id = bal.book_id and bal.author_id = author.id".format( id ) )
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sub_book=[]
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for row in subs:
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# get genres for sub book and add by hand first
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tmp_g = []
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genres = db.engine.execute ( "select genre_lst.id, genre_lst.genre from genre_lst, book_genre_link bgl where genre_lst.id = bgl.genre_id and bgl.book_id = {}".format( row.sub_book_id ) )
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for genre in genres:
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tmp_g.append( { 'id': genre.id, 'genre': genre.genre } )
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sub_book.append( { 'sub_book_id': row.sub_book_id, 'sub_book_num': row.sub_book_num, 'title' : row.title, 'rating': row.rating, 'year_published' : row.year_published, 'notes' : row.notes, 'author_id' : row.author_id, 'author' : row.author, 'genres' : tmp_g } )
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book_s['sub_book'] = sub_book
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print( "parent book details:" )
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print( book.parent_ref )
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print( "child book details:" )
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print( book.child_ref )
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return render_template("books.html", books=book_s, subs=sub_book )
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@app.route("/authors", methods=["GET"])
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def authors():
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authors = Author.query.all()
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return render_template("authors.html", authors=authors)
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@app.route("/author/<id>", methods=["GET", "POST"])
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def author(id):
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### DDP: should this be request.form or request.values?
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author_form = AuthorForm(request.form)
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print("we are here")
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if request.method == 'POST' and author_form.validate():
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print("we are posting")
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id = request.form['id']
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author = Author.query.get(id)
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author.firstnames = request.form['firstnames']
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author.surname = request.form['surname']
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db.session.commit()
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message="Successfully Updated Author (id={})".format(id)
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else:
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author = Author.query.get(id)
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author_form = AuthorForm(request.values, obj=author)
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message=""
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return render_template("author.html", author=author, message=message, author_form=author_form)
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@app.route("/", methods=["GET"])
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def main_page():
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return render_template("main.html")
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if __name__ == "__main__":
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app.run(host="0.0.0.0", debug=True)
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