Question

我有这个问题

我在我的模特服务中有这个

class Service < ApplicationRecord
  belongs_to :user

    has_attached_file :images, :styles => {:md => "300x300>", :large => "500x500>" , :xl => "700x700#"}, :default_url => "/app/assets/images/thumb/missing.png"
    validates_attachment_content_type :images, :content_type => /\Aimage\/.*\Z/   

end

这在我看来服务#index

    <div>
      <%= image_tag service.images(:md)%>
    </div>

但是我的视图中存在一个问题，当我放置：large或：xl但是当我放置时：md图像没有显示。我不知道发生了什么

Answer 1

如果在您的索引视图中将SqlConnection myDBCon = new SqlConnection(sc); SqlCommand command = new SqlCommand("select Caption_name from Commercial_caption", myDBCon); myDBCon.Open(); SqlDataAdapter mySqlAdapter = new SqlDataAdapter(); mySqlAdapter.SelectCommand = command; DataSet ds = new DataSet(); mySqlAdapter.Fill(ds); DropDownList1.DataSource = command.ExecuteReader(); DropDownList1.DataTextField = "Caption_name"; DropDownList1.DataBind(); DropDownList1.Items.Insert(0, new ListItem("--SELECT--","0")); myDBCon.Close();和:large替换为:xl时，:md和:md工作正常，那么我猜测根本没有可用的:md版本。在您实际上传图像后，您是否已将<loc:WrapPanelWithRowsOrColumnsCount xmlns:loc="clr-namespace:..." Orientation="Vertical" RowsOrColumnsCount="2"> <TextBox Text="Andrew" Margin="2" Height="30" /> <TextBox Text="Betty" Margin="2" Height="40" /> <TextBox Text="Celine" Margin="2" Height="20" /> <TextBox Text="Dick" Margin="2" Height="20" /> <TextBox Text="Enron" Margin="2" Height="30" /> <TextBox Text="Felix" Margin="2" Height="20" /> <TextBox Text="Hanibal" Margin="2" Height="30" /> </loc:WrapPanelWithRowsOrColumnsCount>添加到模型中？我会删除图像并再试一次。

回形针不显示图像

1 个答案: