Question

我在Sitecore 7.2中实现了一个计算字段索引。但是，索引管理器现在已经坏了，我得到以下消息

Invalid cast from 'System.String' to 'Sitecore.ContentSearch.ProviderIndexConfiguration'.
    Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

    Exception Details: System.InvalidCastException: Invalid cast from 'System.String' to 'Sitecore.ContentSearch.ProviderIndexConfiguration'.

我为计算字段实现了以下类：

namespace Computed.Search
{
    public class OfficeLocationComputedField : IComputedIndexField
    {
        public string FieldName { get; set; }
        public string ReturnType { get; set; }

        public object ComputeFieldValue(IIndexable indexable)
        {
            Assert.ArgumentNotNull(indexable, nameof(indexable));
            try
            {
                var result = new List<string>();

                var indexableItem = indexable as SitecoreIndexableItem;
                if (indexableItem == null)
                    return null;

                var item = (Item) indexableItem;

                // Treelist fields map to the MultilistField type as per ~/App_Config/FieldTypes.config
                MultilistField field = item?.Fields["officelocation"];
                if (field == null)
                    return null;

                var items = field.GetItems();
                if (items == null || items.Length == 0)
                    return result;

                foreach (var locationItem in items)
                {
                    //result.Add(locationItem.Name); // if you want the name of the item
                    result.Add(locationItem.DisplayName); // if you want the display name of the item
                    //result.Add(locationItem["Title"]); // if you want the value of a field on the item
                }

                return result;

            }
            catch (Exception exception)
            {
                Log.Error($"An Error occured in custom computed index. {exception.Message}", exception);
            }
            return null;
        }
    }
}

配置文件如下：

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <contentSearch>
      <indexConfigurations>
        <defaultLuceneIndexConfiguration>
          <fields hint="raw:AddComputedIndexField">
            <field fieldName="officelocation" storageType="YES" indexType="TOKENIZED">Computed.Search.OfficeLocationComputedField, Computed</field>
          </fields>
        </defaultLuceneIndexConfiguration>
      </indexConfigurations>
    </contentSearch>
  </sitecore>
</configuration>

我不知道自己犯了什么错误或需要改变什么？

Answer 1

90％的情况下，Sitecore Invalid cast from 'System.String' to ...异常是由配置错误造成的。

在您的情况下，Sitecore会尝试将字符串转换为ProviderIndexConfiguration。它是LuceneIndexConfiguration，它继承自ProviderIndexConfiguration。

看起来Sitecore无法将您的补丁文件内容与默认的Lucene索引配置相匹配。

确保您的补丁文件名在Sitecore.ContentSearch.Lucene.DefaultIndexConfiguration.config之后按字母顺序排列。

问题仍然存在，将type属性添加到defaultLuceneIndexConfiguration代码并将其设置为type="Sitecore.ContentSearch.LuceneProvider.LuceneIndexConfiguration, Sitecore.ContentSearch.LuceneProvider"：

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <contentSearch>
      <indexConfigurations>
        <defaultLuceneIndexConfiguration type="Sitecore.ContentSearch.LuceneProvider.LuceneIndexConfiguration, Sitecore.ContentSearch.LuceneProvider">
          <fields hint="raw:AddComputedIndexField">
            <field fieldName="officelocation" storageType="YES" indexType="TOKENIZED">Computed.Search.OfficeLocationComputedField, Computed</field>
          </fields>
        </defaultLuceneIndexConfiguration>
      </indexConfigurations>
    </contentSearch>
  </sitecore>
</configuration>

Answer 2

我创建的旧补丁文件在Sitecore.ContentSearch.Lucene.DefaultIndexConfiguration.conf ig之前按字母顺序排列在Website \ App_Config \ Include文件夹中。我忘了删除它。删除旧文件解决了问题。现在一切正常。

来自＆＃39; System.String＆＃39;的无效演员表to＆＃39; Sitecore.ContentSearch.ProviderIndexConfiguration＆＃39;

2 个答案: