我是在 heroku 上部署我的应用程序的新手，和往常一样，它在第一次尝试时不起作用。但是在开发环境中，它工作得很好。我不太了解日志，所以如果有人可以提供帮助，将不胜感激。:-)
这是我的日志：
2013-07-04T04:52:28.216823+00:00 app[web.1]: 3: <%= owned_products_count(@user) %>
2013-07-04T04:52:28.217058+00:00 app[web.1]: app/views/users/_info.html.erb:14:in `_app_views_users__info_html_erb___312310489209235041_69873501065000'
2013-07-04T04:52:28.216823+00:00 app[web.1]: ActionView::Template::Error (PG::Error: ERROR: operator does not exist: integer = character varying
2013-07-04T04:52:28.216823+00:00 app[web.1]: HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
2013-07-04T04:52:28.217058+00:00 app[web.1]: app/views/users/show.html.erb:3:in `_app_views_users_show_html_erb___2418451874712966399_69873501046980'
2013-07-04T04:52:28.216823+00:00 app[web.1]: LINE 1: ... "products" INNER JOIN "loans" ON "products"."id" = "loans"....
2013-07-04T04:52:28.216823+00:00 app[web.1]: 5: <li id="borrowed_products_count">
2013-07-04T04:52:28.217058+00:00 app[web.1]:
2013-07-04T04:52:28.216823+00:00 app[web.1]: ^
2013-07-04T04:52:28.216823+00:00 app[web.1]: 6: <b><%= t('product.borrowed.count', count: @user.borrowed_products.count) %></b>
2013-07-04T04:52:28.217247+00:00 app[web.1]: HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
2013-07-04T04:52:28.216823+00:00 app[web.1]: : SELECT COUNT(*) FROM "products" INNER JOIN "loans" ON "products"."id" = "loans"."product_id" WHERE "loans"."seeker_id" = $1 AND "loans"."current" = 't' AND "loans"."agreed" = 't'):
2013-07-04T04:52:28.217058+00:00 app[web.1]: 7: </li>
2013-07-04T04:52:28.217058+00:00 app[web.1]: 8: </br>
2013-07-04T04:52:28.216823+00:00 app[web.1]: 4: </li>
2013-07-04T04:52:28.217058+00:00 app[web.1]: 9: <li id="wanted_products_count">
2013-07-04T04:52:28.217058+00:00 app[web.1]:
2013-07-04T04:52:28.217058+00:00 app[web.1]: app/views/users/_info_products_count.html.erb:6:in `_app_views_users__info_products_count_html_erb__2292303326639587721_69873501081120'
2013-07-04T04:52:28.217247+00:00 app[web.1]: LINE 1: ... "products" INNER JOIN "loans" ON "products"."id" = "loans"....
2013-07-04T04:52:28.217247+00:00 app[web.1]: 4: </li>
2013-07-04T04:52:28.217058+00:00 app[web.1]:
2013-07-04T04:52:28.217247+00:00 app[web.1]: 3: <%= owned_products_count(@user) %>
2013-07-04T04:52:28.217058+00:00 app[web.1]: ActionView::Template::Error (PG::Error: ERROR: operator does not exist: integer = character varying
2013-07-04T04:52:28.217247+00:00 app[web.1]: ^
2013-07-04T04:52:28.217247+00:00 app[web.1]: 5: <li id="borrowed_products_count">
2013-07-04T04:52:28.217247+00:00 app[web.1]: 6: <b><%= t('product.borrowed.count', count: @user.borrowed_products.count) %></b>
2013-07-04T04:52:28.217247+00:00 app[web.1]: : SELECT COUNT(*) FROM "products" INNER JOIN "loans" ON "products"."id" = "loans"."product_id" WHERE "loans"."seeker_id" = $1 AND "loans"."current" = 't' AND "loans"."agreed" = 't'):
2013-07-04T04:52:28.217247+00:00 app[web.1]: 8: </br>
2013-07-04T04:52:28.217863+00:00 app[web.1]: app/views/users/show.html.erb:3:in `_app_views_users_show_html_erb___2418451874712966399_69873501046980'
2013-07-04T04:52:28.217863+00:00 app[web.1]:
2013-07-04T04:52:28.217863+00:00 app[web.1]: app/views/users/_info.html.erb:14:in `_app_views_users__info_html_erb___312310489209235041_69873501065000'
2013-07-04T04:52:28.217247+00:00 app[web.1]: 7: </li>
2013-07-04T04:52:28.217863+00:00 app[web.1]: app/views/users/_info_products_count.html.erb:6:in `_app_views_users__info_products_count_html_erb__2292303326639587721_69873501081120'
2013-07-04T04:52:28.217863+00:00 app[web.1]: 9: <li id="wanted_products_count">
2013-07-04T04:52:28.217863+00:00 app[web.1]:
2013-07-04T04:52:28.209972+00:00 heroku[router]: at=info method=GET path=/users/1 host=letroquet.herokuapp.com fwd="88.138.232.224" dyno=web.1 connect=4ms service=531ms status=500 bytes=1266
我了解以下文件存在一些问题：
应用程序/视图/用户/show.html.erb
<% provide(:title, @user.name) %>
<aside class="span3">
<%= render 'users/info' %>
</aside>
<section class="span9">
<ul class="nav nav-tabs" id="dashboard_products">
<li class="active"><a href="#sharable_products" data-toggle="tab"><%= t('tab.user.show.sharable')%></a></li>
<li><a href="#givable_products" data-toggle="tab"><%= t('tab.user.show.givable')%></a></li>
</ul>
<div class="tab-content">
<%= render 'users/show/sharable_products_list' %>
<%= render 'users/show/givable_products_list' %>
</div>
</section>
应用程序/视图/用户/_info.html.erb
<section>
<div>
<span class="gravatar">
<a href="<%= user_path(@user) %>", title="<%= t('my.profile') %>"><%= gravatar_for @user, size: 52 %>
</a>
</span>
<span class="name">
<h1>
<%= @user.name %>
</h1>
</span>
</div>
<%= render 'users/info_products_count' %>
<%= link_to t('product.create.one'), new_product_path, class: "btn btn-primary" unless !current_user?(@user) %>
</section>
app/views/users/_info_products_count.html.erb
<ul class="unstyled">
<li id="owned_products_count">
<%= owned_products_count(@user) %>
</li>
<li id="borrowed_products_count">
<b><%= t('product.borrowed.count', count: @user.borrowed_products.count) %></b>
</li>
</br>
<li id="wanted_products_count">
<%= wanted_products_count(@user) %>
</li>
<li id="requested_products_count">
<%= requested_products_count(@user) %>
</li>
</br>
<li id="given_products_count">
<b><%= t('product.given.count', count: @user.given_products.count) %></b>
</li>
<li id="returned_products_count">
<b><%= t('product.returned.count', count: @user.returned_products.count) %></b>
</li>
</ul>
这里是我的产品助手方法：
module ProductsHelper
def owned_products_count(user)
content_tag(:b, t('product.owned.count', count: user.owned_products.count)) +
content_tag(:ul,
content_tag(:li, t('product.givable.count', count: user.givable_products.count)) +
content_tag(:li, t('product.sharable.count', count: user.sharable_products.count))
)
end
def wanted_products_count(user)
content_tag(:b, t('product.wanted.count', count: user.wanted_products.count)) +
content_tag(:ul,
content_tag(:li, t('product.wanted.agreed.count', count: user.agreed_takings.count)) +
content_tag(:li, t('product.wanted.refused.count', count: user.refused_takings.count))
)
end
def requested_products_count(user)
content_tag(:b, t('product.requested.count', count: user.requested_products.count)) +
content_tag(:ul,
content_tag(:li, t('product.requested.agreed.count', count: user.agreed_borrowings.count)) +
content_tag(:li, t('product.requested.refused.count', count: user.refused_borrowings.count))
)
end
end
还有我的db/schema.rb
ActiveRecord::Schema.define(version: 20130621065539) do
create_table "loans", force: true do |t|
t.string "product_id"
t.string "seeker_id"
t.datetime "borrowing_date"
t.datetime "return_date"
t.boolean "current"
t.boolean "agreed"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "loans", ["product_id", "seeker_id", "borrowing_date", "return_date", "current", "agreed", "created_at"], name: "loans_index"
add_index "loans", ["product_id", "seeker_id", "created_at"], name: "index_loans_on_product_id_and_seeker_id_and_created_at", unique: true
create_table "ownerships", force: true do |t|
t.integer "product_id"
t.integer "offerer_id"
t.datetime "owning_date"
t.datetime "giving_date"
t.boolean "current"
t.boolean "agreed"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "ownerships", ["product_id", "offerer_id", "created_at"], name: "index_ownerships_on_product_id_and_offerer_id_and_created_at", unique: true
add_index "ownerships", ["product_id", "offerer_id", "owning_date", "giving_date", "current", "agreed", "created_at"], name: "ownerships_index"
create_table "products", force: true do |t|
t.string "name"
t.boolean "sharable"
t.boolean "givable"
t.string "picture_file_name"
t.string "picture_content_type"
t.integer "picture_file_size"
t.datetime "picture_updated_at"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "users", ["email"], name: "index_users_on_email", unique: true
add_index "users", ["remember_token"], name: "index_users_on_remember_token"
end