从 'System.String' 到 'Sitecore.ContentSearch.ProviderIndexConfiguration' 的转换无效

Question

我在 Sitecore 7.2 中实现了计算字段索引。但是，索引管理器现在坏了，我收到以下消息

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'.

我已经为我的计算字段实现了以下 class：

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>

我不知道我犯了什么错误或者我还需要更改什么？

Answer 1

Sitecore Invalid cast from 'System.String' to ...异常在90%的情况下都是由配置错误引起的。

在您的情况下，Sitecore 尝试将字符串转换为 ProviderIndexConfiguration。 LuceneIndexConfiguration 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按字母顺序排列在 Sitecore.ContentSearch.Lucene.DefaultIndexConfiguration.config 之后。

如果问题仍然存在，请将 type 属性添加到 defaultLuceneIndexConfiguration 标记并将其设置为 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

我在 Sitecore.ContentSearch.Lucene.DefaultIndexConfiguration.conf‌ ig 之前创建的按字母顺序排列的旧补丁文件仍在 Website\App_Config\Include 文件夹中。我忘了删除它。删除那个旧文件解决了这个问题。现在一切正常。

从 'System.String' 到 'Sitecore.ContentSearch.ProviderIndexConfiguration' 的转换无效

Invalid cast from 'System.String' to 'Sitecore.ContentSearch.ProviderIndexConfiguration'

c#

.net

sitecore

sitecore7.2