Created
February 17, 2012 10:40
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A way to lazy load partials in Rails 3
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| class Controller | |
| include LazyLoad | |
| def show | |
| @model = Model.find(...) | |
| respond_to do |format| | |
| format.html do | |
| @html_specific_data = Model.find(...) | |
| end | |
| render_lazy_load(format) do | |
| @lazy_specific_data = Model.find(...) | |
| end | |
| end | |
| end | |
| end |
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| module Helper | |
| def lazy_render(name) | |
| content_tag :div, :id => "lazy-loaded-#{name}" do | |
| content_tag :div, :class => "spinner" do | |
| content_tag(:script) do | |
| "if(!window.lazyLoads) { window.lazyLoads = []; }; window.lazyLoads.push('#{name}');".html_safe | |
| end | |
| end | |
| end | |
| end | |
| end |
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| module LazyLoad | |
| def render_lazy_load(format, &block) | |
| format.js do | |
| block.call if block | |
| render json: { | |
| lazy_load_partial: params[:lazy_load_partial], | |
| body: render_to_string(:partial => params[:lazy_load_partial]) | |
| } | |
| end | |
| end | |
| end |
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| if window.lazyLoads | |
| for lazyLoad in window.lazyLoads | |
| url = window.location.href + "?format=js&lazy_load_partial=#{lazyLoad}" | |
| $.ajax url: url, dataType: "json", success: (data) -> | |
| $("#lazy-loaded-#{data.lazy_load_partial}").html(data.body) |
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| = render 'foobar' | |
| becomes | |
| = lazy_render 'foobar' |
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