Question

我正在尝试使用Breeze中的“any”运算符来查询许多表，我收到以下错误 - TypeError：无法获取属性'isAnonymous'的值：object is null或undefined

我能找到的唯一与此相关的stackoverflow问题就是这个问题，但isAnonymous问题没有解决办法，因为海报没有提供更多代码：

breeze projection : error selecting non scalar navigation properties

我正在使用Breeze 1.4.11 实体框架5

我尝试运行的查询是

var getEntities = function (entitiesObservable) {
    var whereClause = "";

    whereClause = Predicate.create("t_entity_nm", "any", "frst_nm", "startsWith", "Frank");

    var query = EntityQuery.from("Entities")
                           .where(whereClause)
                           .expand("t_entity_nm");

    $('#loading-indicator').show();
    return manager.executeQuery(query)
                  .then(querySucceeded)
                  .fail(queryFailed);

    function querySucceeded(data) {
        $('#loading-indicator').hide();
        if (entitiesObservable) {
            entitiesObservable(data.results);
        }
        log("Retrieved [Entities] from remote data source", data, true);
    }
};

t_entity加入t_entity_nm上的entity_sys_key_id ...他们是观点...这里是视图定义

CREATE VIEW [dbo].[t_entity]
(     [entity_sys_key_id]
    , [pers_flag]
    , [dob_dt]
    , [birth_plc]
    , [sin]
    , [hsn]
    , [drv_lcnc_num]
    , [ap_vndr_num]
    , [ar_cstmr_num]
    , [sec_grp_sys_key_id]
    , [actv_flag]
    , [log_eff_dt]
    , [log_can_dt]
    , [log_upd_by]
    , [sys_del_flag]
    , [sys_ts] 
)
AS
SELECT 
      [entity_sys_key_id]
    , [pers_flag]
    , [dob_dt]
    , [birth_plc]
    , [sin]
    , [hsn]
    , [drv_lcnc_num]
    , [ap_vndr_num]
    , [ar_cstmr_num]
    , [sec_grp_sys_key_id]
    , [actv_flag]
    , [log_eff_dt]
    , [log_can_dt]
    , [log_upd_by]
    , [sys_del_flag]
    , [sys_ts] 
FROM [CMN_DEV].[dbo].[t_entity]

CREATE VIEW [dbo].[t_entity_nm] 
(
      [entity_nm_sys_key_id]
    , [entity_sys_key_id]
    , [entity_nm_typ_cd]
    , [saltn_cd]
    , [frst_nm]
    , [mid_nm]
    , [last_nm]
    , [firm_nm]
    , [nysiis_key]
    , [prmy_flag]
    , [sec_grp_sys_key_id]
    , [log_eff_dt]
    , [log_can_dt]
    , [log_upd_by]
    , [sys_del_flag]
    , [sys_ts] 
)
AS 
SELECT 
      [entity_nm_sys_key_id]
    , [entity_sys_key_id]
    , [entity_nm_typ_cd]
    , [saltn_cd]
    , [frst_nm]
    , [mid_nm]
    , [last_nm]
    , [firm_nm]
    , [nysiis_key]
    , [prmy_flag]
    , [sec_grp_sys_key_id]
    , [log_eff_dt]
    , [log_can_dt]
    , [log_upd_by]
    , [sys_del_flag]
    , [sys_ts] 
FROM [CMN_DEV].[dbo].[t_entity_nm]

Breeze Controller看起来像这样：

namespace MarketingPromotions.Controllers
{
    [BreezeController(MaxAnyAllExpressionDepth = 2)]
    public class BreezeController : ApiController
    {

    readonly EFContextProvider<OASIS_DEVEntities> _contextProvider =
            new EFContextProvider<OASIS_DEVEntities>();

        [HttpGet]
        public string Metadata()
        {
            return _contextProvider.Metadata();
        }
        #endregion

        [HttpGet]
        public IQueryable<t_entity> Entities()
        {
            return _contextProvider.Context.t_entity;
        }

        [HttpGet]
        public IQueryable<t_entity_nm> EntityNames()
        {
            return _contextProvider.Context.t_entity_nm;
        }
}

它破坏的代码在breeze.debug.js的行上 - ＆gt;

if (entityType.isAnonymous) return;

其中“this”是breeze.debug.js的以下代码片段中的frst_nm字段：

proto._validate = function(entityType) {
        // will throw if not found;
        if (this.isValidated) return;            
        this.isValidated = true;
        if (this.propertyPath) {
            if (entityType.isAnonymous) return;
            var prop = entityType.getProperty(this.propertyPath, true);
            if (!prop) {
                var msg = __formatString("Unable to resolve propertyPath.  EntityType: '%1'   PropertyPath: '%2'", entityType.name, this.propertyPath);
                throw new Error(msg);
            }
            if (prop.isDataProperty) {
                this.dataType = prop.dataType;
            } else {
                this.dataType = prop.entityType;
            }
        } else if (this.fnNodes) {
            this.fnNodes.forEach(function(node) {
                node._validate(entityType);
            });
        }
    };

Answer 1

这看起来像资源名称问题。我的猜测是你还没有建立资源名称/实体类型映射。

看一下这些链接：

http://www.breezejs.com/documentation/query-result-debugging

http://www.breezejs.com/sites/all/apidocs/classes/MetadataStore.html#method_setEntityTypeForResourceName

和这一个：http://www.breezejs.com/documentation/querying-locally 在子主题下：资源名称不是实体类型名称

Breeze.js - 尝试使用＆＃34;任何＆＃34;时出错operator - error：无法获取属性的值＆＃39; isAnonymous＆＃39;：object为null或undefined

1 个答案: