在Rails 5.2.2中,我试图使用局部变量作为集合来渲染部分,但是在对Map
视图进行测试时,我在部分中得到了错误:
// Your Topic Resource
ConfigResource cr = new ConfigResource(Type.TOPIC, "mytopic");
// Create all your configurations
Collection<ConfigEntry> entries = new ArrayList<>();
entries.add(new ConfigEntry(TopicConfig.SEGMENT_BYTES_CONFIG, String.valueOf(segmentbytes)));
entries.add(new ConfigEntry(TopicConfig.RETENTION_BYTES_CONFIG, String.valueOf(retentionBytes)));
...
// Create the Map
Config config = new Config(entries);
Map<ConfigResource, Config> configs = new HashMap<>();
configs.put(cr, config);
// Call alterConfigs()
admin.alterConfigs(configs);
work_centers_controller.rb
get
kanban.html.erb
ActionView::Template::Error: ActionView::Template::Error: undefined local variable or method `item' for #<#<Class:0x00000007503de8>:0x000000093f2240>
app/views/work_centers/_item_kanban.html.erb:1:in `_app_views_work_centers__item_kanban_html_erb__413475955005549970_77587680'
app/views/work_centers/kanban.html.erb:5:in `block in _app_views_work_centers_kanban_html_erb__2029427675221229249_77567000'
app/views/work_centers/kanban.html.erb:4:in `each'
app/views/work_centers/kanban.html.erb:4:in `_app_views_work_centers_kanban_html_erb__2029427675221229249_77567000'
test/controllers/work_centers_controller_test.rb:27:in `block in <class:WorkCentersControllerTest>'
_item_kanban.html.erb
def kanban
# Get hash of form {"Laser"=>["Item1", "Item2"], "Brake"=>["Item2"]}
@wc_items = HashWithIndifferentAccess.new
WorkCenter.all.each do |wc|
@wc_items[wc.name] = Item.where('id IN (SELECT item_id
FROM routings
WHERE work_center_id = ?)', wc.id)
.where('id NOT IN (SELECT item_id
FROM status_updates
WHERE work_center_id = ?)', wc.id)
.pluck(:number)
end
end
在其他视图中,我使用集合实例变量(例如<% @wc_items.each do |wc, items| %>
<%= render partial: 'item_kanban', collection: items %>
<% end %>
)渲染部分,并引用部分中的单数变量(例如<%= link_to item, class: "list-group-item" do %>
<%= item.number %>
<% end %>
)。我希望这个局部变量使用本地集合变量的行为相同。
答案 0 :(得分:0)
请尝试
<%= render partial: 'item_kanban', collection: items, as: :item %>
现在您可以访问
<%= link_to item, class: "list-group-item" do %>
<%= item.number %>
<% end %>
当你这样做
<%= render partial: 'item_kanban', collection: items %>
将为您提供item_kanban
局部变量,而不是item
变量。
因此,您需要通过as: :item
指定它,现在您可以访问item