now have a Person class & associated CReate/Update/Delete functions, and menu in base.html

person.py

@@ -0,0 +1,108 @@
+from wtforms import SubmitField, StringField, HiddenField, validators, Form
+from flask_wtf import FlaskForm
+from flask import request, render_template, redirect
+from main import db, app, ma
+from sqlalchemy import Sequence
+from sqlalchemy.exc import SQLAlchemyError
+from status import st, Status
+
+################################################################################
+# Class describing Person in the database, and via sqlalchemy, connected to the DB as well
+################################################################################
+class Person(db.Model):
+    id = db.Column(db.Integer, db.Sequence('person_id_seq'), primary_key=True )
+    tag = db.Column(db.String(48), unique=False, nullable=False)
+    surname = db.Column(db.String(48), unique=False, nullable=False)
+    firstname = db.Column(db.String(48), unique=False, nullable=False)
+
+    def __repr__(self):
+        return "<tag: {}, firstname: {}, surname: {}>".format(self.tag,self.firstname, self.surname)
+
+################################################################################
+# Helper class that inherits a .dump() method to turn class Person into json / useful in jinja2
+################################################################################
+class PersonSchema(ma.SQLAlchemyAutoSchema):
+    class Meta:
+        model = Person
+        ordered = True
+
+################################################################################
+# Helper class that defines a form for person, used to make html <form>, with field validation (via wtforms)
+################################################################################
+class PersonForm(FlaskForm):
+    id = HiddenField()
+    tag = StringField('Tag (searchable name):', [validators.DataRequired()])
+    firstname = StringField('FirstName(s):', [validators.DataRequired()])
+    surname = StringField('Surname:', [validators.DataRequired()])
+    submit = SubmitField('Save' )
+    delete = SubmitField('Delete' )
+
+################################################################################
+# Routes for person data
+#
+# /persons -> GET only -> prints out list of all persons
+################################################################################
+@app.route("/persons", methods=["GET"])
+def persons():
+    persons = Person.query.all()
+    return render_template("persons.html", persons=persons, alert=st.GetAlert(), message=st.GetMessage() )
+ 
+
+################################################################################
+# /person -> GET/POST -> creates a new person type and when created, takes you back to /persons
+################################################################################
+@app.route("/person", methods=["GET", "POST"])
+def new_person():
+    form = PersonForm(request.form)
+    page_title='Create new Person'
+    if 'surname' not in request.form:
+        return render_template("person.html", form=form, page_title=page_title )
+    else:
+        person = Person( tag=request.form["tag"], surname=request.form["surname"], firstname=request.form["firstname"] )
+        try:
+            db.session.add(person)
+            db.session.commit()
+            print(person)
+            st.SetMessage( "Created new Person ({})".format(person.tag) )
+            return redirect( '/persons' )
+        except SQLAlchemyError as e:
+            st.SetAlert( "danger" )
+            st.SetMessage( "<b>Failed to add Person:</b>&nbsp;{}".format(e.orig) )
+            return render_template("person.html", form=form, page_title=page_title, alert=st.GetAlert(), message=st.GetMessage() )
+
+################################################################################
+# /person/<id> -> GET/POST(save or delete) -> shows/edits/delets a single
+# person
+################################################################################
+@app.route("/person/<id>", methods=["GET", "POST"])
+def person(id):
+    form = PersonForm(request.form)
+    page_title='Edit Person'
+    if request.method == 'POST':
+        try:
+            person = Person.query.get(id)
+            if 'delete' in request.form:
+                st.SetMessage("Successfully deleted Person: ({})".format( person.tag ) )
+                person = Person.query.filter(Person.id==id).delete()
+            if 'submit' in request.form and form.validate():
+                st.SetMessage("Successfully Updated Person: (From: {}, {}, {})".format(person.tag, person.firstname, person.surname) )
+                person.tag = request.form['tag']
+                person.surname = request.form['surname']
+                person.firstname = request.form['firstname']
+                st.AppendMessage(" To: ({}, {}, {})".format(person.tag, person.firstname, person.surname) )
+            db.session.commit()
+            return redirect( '/persons' )
+        except SQLAlchemyError as e:
+            st.SetAlert( "danger" )
+            st.SetMessage( "<b>Failed to modify Person:</b>&nbsp;{}".format(e.orig) )
+            return render_template("person.html", form=form, page_title=page_title, alert=st.GetAlert(), message=st.GetMessage() )
+    else:
+        person = Person.query.get(id)
+        form = PersonForm(request.values, obj=person)
+    return render_template("person.html", object=person, form=form, page_title = page_title, alert=st.GetAlert(), message=st.GetMessage() )
+
+################################################################################
+# helper fund to GetPersons -> person_list -> jinja2 for person drop-down in book.html
+################################################################################
+def GetPersons():
+    return Person.query.order_by('surname','firstname').all()