Flask wtforms AttributeError: 'HTMLString' object has no attribute 'paginate' - flask

Question

Somebody has helped me with some great code here to show the same form multiple times each with a submit button, it works a treat, But as I will have hundreds of forms I need to paginate the page, I have been able to paginate pages in the past but I dont no how to use that code with a form in a for loop.
here is my code:(with lots of help from Greg)
#bp.route('/stock', methods=['GET', 'POST'])
#bp.route('/stock/stock/', methods=['GET', 'POST'])
#login_required
def stock():
stocks = Stock.query.all()
forms = []
for stock in stocks:
form = AddStockForm()
form.id.default = stock.id
form.image.default = stock.image_url
form.date.default = stock.date
form.description.default = stock.description
form.event.default = stock.event
form.achat.default = stock.achat
form.vente.default = stock.vente
form.sold.default = stock.sold
forms.append(form)
for form in forms:
if form.validate_on_submit():
if form.modify.data:
stock = Stock.query.filter_by(id=form.id.data).one()
stock.date = form.date.data
stock.description = form.description.data
stock.event = form.event.data
stock.achat = form.achat.data
stock.vente = form.vente.data
stock.sold = form.sold.data
db.session.add(stock)
db.session.commit()
elif form.delete.data:
stock = Stock.query.filter_by(id=form.id.data).one()
db.session.delete(stock)
db.session.commit()
return redirect(url_for('stock.stock'))
form.process() # Do this after validate_on_submit or breaks CSRF token
page = request.args.get('page', 1, type=int)
forms = forms[1].id().paginate(
page, current_app.config['ITEMS_PER_PAGE'], False)
next_url = url_for('stock.stock', page=forms.next_num) \
if forms.has_next else None
prev_url = url_for('stock.stock', page=forms.prev_num) \
if forms.has_prev else None
return render_template('stock/stock.html',forms=forms.items, title=Stock, stocks=stocks)
I am trying to use the fact "forms" is a list to paginate the results, I obviously dont understand how to do this, I have looked at flask-paginate but I didnt understand that either!
all help is greatly needed
Warm regards, Paul.
EDIT
I have tried to use flask_pagination, here is my code:
#bp.route('/stock/stock/', methods=['GET', 'POST'])
#login_required
def stock():
search = False
q = request.args.get('q')
if q:
search = True
page = request.args.get(get_page_parameter(), type=int, default=1)
stocks = Stock.query.all()
forms = []
#rest of code here#
pagination = Pagination(page=page, total=stocks.count(), search=search, record_name='forms')
form.process() # Do this after validate_on_submit or breaks CSRF token
return render_template('stock/stock.html',forms=forms, title=Stock, pagination=pagination)
This gives a different error "TypeError: count() takes exactly one argument (0 given)" I also tried with "total=forms.count()" and got the same error!

Answer 1

I hate doing this as it shows a lack of patience at the begining but this answer may help others, I solved my problem in two ways the first was the query which decides the order of display (descending or ascending) this then allowed me to use flask-paginate to display the results on several pages, I realised that I was dealing with a list, and the example by one of the developers link showed me the way, here is my code,
from flask_paginate import Pagination, get_page_args
#bp.route('/stock', methods=['GET', 'POST'])
#bp.route('/stock/stock/', methods=['GET', 'POST'])
#login_required
def stock():
stocks = Stock.query.order_by(Stock.id.desc())# this gives order of results
forms = []
def get_forms(offset=0, per_page=25): #this function sets up the number of
return forms[offset: offset + per_page] #results per page
for stock in stocks:
form = AddStockForm()
form.id.default = stock.id
form.image.default = stock.image_url
form.date.default = stock.date
form.description.default = stock.description
form.event.default = stock.event
form.achat.default = stock.achat
form.vente.default = stock.vente
form.sold.default = stock.sold
forms.append(form)
for form in forms:
if form.validate_on_submit():
if form.modify.data:
stock = Stock.query.filter_by(id=form.id.data).one()
stock.date = form.date.data
stock.description = form.description.data
stock.event = form.event.data
stock.achat = form.achat.data
stock.vente = form.vente.data
stock.sold = form.sold.data
db.session.add(stock)
db.session.commit()
elif form.delete.data:
stock = Stock.query.filter_by(id=form.id.data).one()
db.session.delete(stock)
db.session.commit()
return redirect(url_for('stock.stock'))
#this is the code from the link that I used to paginate
page, per_page, offset = get_page_args(page_parameter='page',
per_page_parameter='per_page')
total = len(forms) # this code counts the resulting list to be displayed
pagination_forms = get_forms(offset=offset, per_page=per_page)
pagination = Pagination(page=page, per_page=per_page, total=total)
form.process() # Do this after validate_on_submit or breaks CSRF token
return render_template('stock/stock.html', title=Stock, stocks=stocks
page=page, forms=pagination_forms, per_page=per_page, pagination=pagination)
#And finally this is the pagination passed to the html
so this for all those numptys like me who struggle with everything but still love it.