java - How to fetch many to one and many to many by one request? -


i have 4 tables, example:

  • admin (id, email, role) - many 1
  • role (id, rights) - 1 many
  • right (id, roles) - 1 many
  • role_right (role, right) - many many

i need admin email fetching role , list of rights in role jpa named queries. know how 2 queries want 1 sql request.

for example this:

select admin admin admin join fetch admin.role role {maybe there need fetch rights} admin.email = :email

thank helping!

update:

ok, found solution. set annotations table roles:

@entity @table(name = "hls_admin_role", schema = "public") public final class adminrole implements serializable {     ...     @manytomany     @jointable(name = "hls_admin_role_right",             joincolumns = { @joincolumn(name = "role_id") },             inversejoincolumns = { @joincolumn(name = "right_id") })     private list<adminright> rights = new arraylist<>();     ... }

set annotations table rights:

@entity     @table(name = "hls_admin_right", schema = "public") public final class adminright implements serializable {     ...     @manytomany(mappedby = "rights")     private list<adminrole> roles = new arraylist<>();     ... }

after works fine with:

@repository public interface adminrepository extends baserepository<admin, long> {     @query("select admin admin admin " +            "inner join fetch admin.role role "+            "inner join fetch role.rights rights " +            "where admin.email = :email")     admin findbyemailfetchall(final @param("email") string email); }

maybe have best solution.


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