1

给出一个控制器和一个方法，例如：

import genshi
from pylons import  tmpl_context, request, url
import re
from tg import expose, flash
from tg.controllers import  redirect
from tg.decorators import validate
import tw.forms as twf
from tw.forms.datagrid import DataGrid
from tg.decorators import paginate
from tg.i18n import ugettext as _
from repoze.what.predicates import has_permission
from interlock.lib.base import BaseController
assigned_seller_product_grid = DataGrid(fields=[
    ('Product Name', 'name'),
    ('Producer', 'producer'),
])

unassigned_seller_product_grid = DataGrid(fields=[
    ('Product Name', 'name'),
    ('Producer', 'producer'),
])


class SellerController(BaseController):
    allow_only = has_permission('manage')

    @paginate("unassigned", items_per_page=5, use_prefix=True)
    @paginate("assigned",   items_per_page=5, use_prefix=True)
    @expose('demo.templates.sellers.products')
    def products(self, uid = None, **kw):
        seller = uid is not None and DBSession.query(SellerModel).filter_by(uid=uid, deleted=False).first()
        if uid is not None and not seller:
            flash(_('No Seller ID Defined'), 'warning')
            redirect('/seller/')
        unassigned = DBSession.query(ProductModel).filter(~ProductModel.sellers.any(SellerModel.uid == seller.uid)).filter(ProductModel.deleted == False)
        assigned = DBSession.query(ProductModel).filter(ProductModel.sellers.any(SellerModel.uid == seller.uid)).filter(ProductModel.deleted == False)

        return dict(seller=seller,
                    assigned=assigned,
                    unassigned = unassigned,
                    assigned_grid=assigned_seller_product_grid,
                    unassigned_grid=unassigned_seller_product_grid,
                    page='seller')

还有一个像这样的模板：

<h1>Assigned Products</h1>
<div py:if="assigned">${assigned_grid(assigned)}</div>
<div>${tmpl_context.paginators.assigned.pager(page_param='assigned_page')}</div>
<h1>Unassigned Products</h1>
    <div py:if="unassigned">${unassigned_grid(unassigned)}</div>
    <div>${tmpl_context.paginators.unassigned.pager(page_param='unassigned_page')}</div>

我看到 TG2 正确生成了分页链接，但分页只是使用第一个装饰器更改页面，而忽略了第二个。以前有人遇到过这个问题吗？

谢谢。

4

2 回答 2

1

当前TG 上的@paginate装饰器不允许在同一页面上处理多个分页器。下一个版本将提供新版本的装饰器。同时，您可以用以下实现替换@paginate装饰器（只需将其保存为 myproject.lib.paginate 并导入它而不是 tg.decorators.paginate）：

from tg.decorators import Decoration
from tg.paginate import Page
from tg.util import Bunch, partial
from tg import request

class paginate(object):
    def __init__(self, name, use_prefix=False,
        items_per_page=10, max_items_per_page=0):
        self.name = name
        prefix = use_prefix and name + '_' or ''
        self.page_param = prefix + 'page'
        self.items_per_page_param = prefix + 'items_per_page'
        self.items_per_page = items_per_page
        self.max_items_per_page = max_items_per_page

    def __call__(self, func):
        decoration = Decoration.get_decoration(func)
        decoration.register_hook('before_validate', self.before_validate)
        decoration.register_hook('before_render', self.before_render)
        return func

    def before_validate(self, remainder, params):
        page_param = params.pop(self.page_param, None)
        if page_param:
            try:
                page = int(page_param)
                if page < 1:
                    raise ValueError
            except ValueError:
                page = 1
        else:
            page = 1

        try:
            paginators_data = request.paginators
        except:
            paginators_data = request.paginators = {'_tg_paginators_params':{}}

        paginators_data['_tg_paginators_params'][self.page_param] = page_param
        paginators_data[self.name] = paginator = Bunch()

        paginator.paginate_page = page or 1
        items_per_page = params.pop(self.items_per_page_param, None)
        if items_per_page:
            try:
                items_per_page = min(
                    int(items_per_page), self.max_items_per_page)
                if items_per_page < 1:
                    raise ValueError
            except ValueError:
                items_per_page = self.items_per_page
        else:
            items_per_page = self.items_per_page
        paginator.paginate_items_per_page = items_per_page
        paginator.paginate_params = params.copy()
        paginator.paginate_params.update(paginators_data['_tg_paginators_params'])
        if items_per_page != self.items_per_page:
            paginator.paginate_params[self.items_per_page_param] = items_per_page

    def before_render(self, remainder, params, output):
        if not isinstance(output, dict) or not self.name in output:
            return

        paginator = request.paginators[self.name]
        collection = output[self.name]
        page = Page(collection, paginator.paginate_page,
            paginator.paginate_items_per_page, controller='/')
        page.kwargs = paginator.paginate_params
        if self.page_param != 'name':
            page.pager = partial(page.pager, page_param=self.page_param)
        if not getattr(tmpl_context, 'paginators', None):
            tmpl_context.paginators = Bunch()
        tmpl_context.paginators[self.name] = output[self.name] = page
于 2011-12-22T17:01:22.153 回答
1

使用 use_prefix attr 并将其值设置为 True

例如：

@paginate("movie1",items_per_page=5, use_prefix=True)
@paginate("movie2",items_per_page=5, use_prefix=True)

在涡轮齿轮上工作已验证

于 2014-01-14T06:59:29.117 回答