Unique constraint on single String column with GreenDao - 屁屁侠

Unique constraint on single String column with GreenDao

转：http://stackoverflow.com/questions/22070281/greendao-support-for-unique-constraint-on-multiple-columns

Does GreenDao supports unique constraint on multiple columns? Equivalent of the following:

create table projects (
  _id integer primary key autoincrement,
  project_type text,
  name text,
  unique (project_type, name)
);

Yes, it supports.

Create an index with all the properties and make it unique.

Index indexUnique = new Index();
indexUnique.addProperty(project_type);
indexUnique.addProperty(name);
indexUnique.makeUnique();
projectsEntity.addIndex(indexUnique);