Two Methods per Alex

admin.py

@app.route('/edit/<int:page_id>', methods=['GET'])
def edit(page_id):
    context = "Edit"
    page = Page.query.get(page_id)
    title = page.title
    text = page.text
    return render_template('edit.html', title=title, text=text, context=context)


@app.route('/edit/<int:page_id>', methods=['POST'])
def update(page_id):
    context = "Edit"
    title = request.form['title']
    text = request.form['text']
    if not request.form['title']:
        flash('Title is required', 'error')
    elif not request.form['text']:
        flash('Text is required', 'error') 
    else:
        page = Page.query.get(page_id)
        page.title = title
        page.text = text
        db.session.commit()
        flash(u'Page was successfully updated')
        return redirect(url_for('show_all'))
    return render_template('edit.html', title=title, text=text, context=context)