我在这里找到了一个不错的分页模板。然而,这个例子是用 SQLlite 完成的,但我重写了以便能够使用 CouchDB。
此脚本创建用户并将其保存到 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)
我修改了onrder 中的原始app.py脚本,以便能够使用 CouchDB。这是修改后的脚本:
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)
从视图中获取总数的最佳方法是什么?
有没有办法通过单击分页菜单中的下一页或上一页来避免重新计算总计数?