solr导入了多个entity，如何指定一个entity查询全部呢？

[ccubee]

经过资讯， 查到了这个

If you have defined an Entity for each table as well as a Combined one, you can add an identifier to each of the entity and use that identifier to filter the results.
e.g.
Add a field type to each entity with fixed values as PERSON, LOCATION CITY ....
And for queries use fq=type:PERSON to filter the results for the specific entity.

但是如何给entity添加字段，并添加固定值没搞明白，请问该怎样添加字段跟固定值呢？

[ccubee]

每一个entity 加一个字段用来做标志 比如 user类 每一个数据加一个字段falg: A，person 加字段 flag：B 以此来区分