I found here a nice template for a pagination. However, this example was done with SQLlite, but I rewrote in order to be able to use CouchDB.
This script creates users and save them to CouchDB:
from couchdb import Server
import sys
def fill_data(users_no):
for i in range(users_no):
doc = {
'_id': str(i),
'uname': "name_" + str(i),
}
db.save(doc)
if __name__ == '__main__':
server = Server()
db = server.create("pagination")
fill_data(1000)
I modified the orginal app.py script in onrder to be able to use CouchDB. This is the modified script:
from __future__ import unicode_literals
from flask import Flask, render_template, g, current_app, request
from flask.ext.paginate import Pagination
from couchdb import Server
app = Flask(__name__)
app.config.from_pyfile('app.cfg')
@app.route('/')
def index():
"""
Map function
function(doc) {
emit(doc._id, doc.uname);
}
"""
for row in db.view('_design/snp/_view/by_unames'):
print row
total = ???
print total
page, per_page, offset = get_page_items()
pagination = get_pagination(page=page,
per_page=per_page,
total=total,
record_name=users,
)
return render_template('index.html', users=users,
page=page,
per_page=per_page,
pagination=pagination,
)
def get_css_framework():
return current_app.config.get('CSS_FRAMEWORK', 'bootstrap3')
def get_link_size():
return current_app.config.get('LINK_SIZE', 'sm')
def show_single_page_or_not():
return current_app.config.get('SHOW_SINGLE_PAGE', False)
def get_page_items():
page = int(request.args.get('page', 1))
per_page = request.args.get('per_page')
if not per_page:
per_page = current_app.config.get('PER_PAGE', 10)
else:
per_page = int(per_page)
offset = (page - 1) * per_page
return page, per_page, offset
def get_pagination(**kwargs):
kwargs.setdefault('record_name', 'records')
return Pagination(css_framework=get_css_framework(),
link_size=get_link_size(),
show_single_page=show_single_page_or_not(),
**kwargs
)
if __name__ == '__main__':
server = Server()
db = server["pagination"]
app.run(debug=True)
What is the best way to get the total count from the view?
Is there a way to avoid to recalculate total count by clicking to the next or previous page in the pagination menu?
