自定义will_paginage
自定义will_paginage输出 ill_paginate是Rails中比较常用的分页插件，但是有时候我们可能想要自定义它的输出，这可以通过扩展WillPaginate::LinkRenderer类来实现，比如，下面的renderer将会去除Next和Previous链接： Ruby代码class CustomPaginationRenderer < WillPaginate::LinkRenderer
def to_html
links = @options[:page_links] ? windowed_links : []
html = links.join(@options[:separator])
@options[:container] ? @template.content_tag(:div, html, html_attributes) : html
end
end
class CustomPaginationRenderer < WillPaginate::LinkRenderer
def to_html
links = @options[:page_links] ? windowed_links : []
html = links.join(@options[:separator])
@options[:container] ? @template.content_tag(:div, html, html_attributes) : html
end
end
class CustomPaginationRenderer < WillPaginate::LinkRenderer
def to_html
links = @options[:page_links] ? windowed_links : []
html = links.join(@options[:separator])
@options[:container] ? @template.content_tag(:div, html, html_attributes) : html
end
end 要在view中使用这个自定义的renderer，只需要加上:renderer参数即可： Html代码
<%= will_paginate @items, ;:renderer => ‘CustomPaginationRenderer’ %>
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<%= will_paginate @items, ;:renderer => ‘CustomPaginationRenderer’ %>
<%= will_paginate @items, ;:renderer => ‘CustomPaginationRenderer’ %>
下面给出一个更复杂的自定义Renderer，它会在分页链接后显示一个文本框，以及一个‘Goto’按钮，允许用户直接跳转到某一页： Ruby代码
class CustomPaginationRenderer < WillPaginate::LinkRenderer
@@id = 1
def to_html
links = @options[:page_links] ? windowed_links : []
# previous/next buttons
links.unshift page_link_or_span(@collection.previous_page, ‘disabled’, @options[:prev_label])
links.push page_link_or_span(@collection.next_page, ‘disabled’, @options[:next_label])
html = links.join(@options[:separator])
html= goto_box
@options[:container] ? @template.content_tag(:div, html, html_attributes) : html
end
private
def goto_box
@@id= 1
@@id = 1 if @@id > 100
<<-GOTO
<input type="text" maxlength="5" size="3" id="page#{@@id}" />
<input type="submit"value="Goto"/>
<script type="text/javascript">
function goto_page#{@@id}()
{
page = Number($(’page#{@@id}’).value)
total = #{total_pages}
if(page < 1 || page > total)
{
alert(’Please enter a number between 1 and ‘ total ‘!’)
return;
}
var link = ‘#{@template.url_for(url_options("_page"))}’
var new_link = link.replace("_page", page)
window.location.assign(new_link)
}
</script>
GOTO
end
end
class CustomPaginationRenderer < WillPaginate::LinkRenderer
@@id = 1
def to_html
links = @options[:page_links] ? windowed_links : []
# previous/next buttons
links.unshift page_link_or_span(@collection.previous_page, ‘disabled’, @options[:prev_label])
links.push page_link_or_span(@collection.next_page, ‘disabled’, @options[:next_label])
html = links.join(@options[:separator])
html= goto_box
@options[:container] ? @template.content_tag(:div, html, html_attributes) : html
end
private
def goto_box
@@id= 1
@@id = 1 if @@id > 100
<<-GOTO
<input type="text" maxlength="5" size="3" id="page#{@@id}" />
<input type="submit"value="Goto"/>
<script type="text/javascript">
function goto_page#{@@id}()
{
page = Number($(’page#{@@id}’).value)
total = #{total_pages}
if(page < 1 || page > total)
{
alert(’Please enter a number between 1 and ‘ total ‘!’)
return;
}
var link = ‘#{@template.url_for(url_options("_page"))}’
var new_link = link.replace("_page", page)
window.location.assign(new_link)
}
</script>
GOTO
end
end
class CustomPaginationRenderer < WillPaginate::LinkRenderer
@@id = 1
def to_html
links = @options[:page_links] ? windowed_links : []
# previous/next buttons
links.unshift page_link_or_span(@collection.previous_page, ‘disabled’, @options[:prev_label])
links.push page_link_or_span(@collection.next_page, ‘disabled’, @options[:next_label])
html = links.join(@options[:separator])
html= goto_box
@options[:container] ? @template.content_tag(:div, html, html_attributes) : html
end
private
def goto_box
@@id= 1
@@id = 1 if @@id > 100
<<-GOTO
<input type="text" maxlength="5" size="3" id="page#{@@id}" />
<input type="submit"value="Goto"/>
<script type="text/javascript">
function goto_page#{@@id}()
{
page = Number($(’page#{@@id}’).value)
total = #{total_pages}
if(page < 1 || page > total)
{
alert(’Please enter a number between 1 and ‘ total ‘!’)
return;
}
var link = ‘#{@template.url_for(url_options("_page"))}’
var new_link = link.replace("_page", page)
window.location.assign(new_link)
}
</script>
GOTO
end
end@@id的作用是因为一个view中有可能多次调用will_paginate，需要对inputbox进行区分，这个renderer还用到了一些继承自WillPaginate::LinkRenderer的方法： url_for(page), 返回指向某页的链接，比如url_for(1) => ‘/posts?page=1′ total_pages, 返回总页数 page_link_or_span，返回指向某页面的链接 更多方法可以在WillPaginate的view_helper.rb中找到。 上一页
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