存储库模式多个选择器

Question

Using a UnitOfWork Repository pattern I can access a reference using :

var tmp = unitOfWork.Repository<User>().Queryable();

I wish to query the table and recover an account where AccountId is an long:

result = a.Any(e => e.AccountId == AccountId);

This provides me with a record of the account for AccountId .

I also have a table called Emails which is linked to the Account table. So I now wish to update the query above to the following:

result = a.Any(e => 
    e.AccountId == AccountId &&
    e.Email.EmailID == EmailID
);

Where EmailId is a long. This should now pull an specific Email for a specific user account.

What I get is:

Operator '&&' cannot be applied to operands of type 'bool' and 'User'

Answer 1

It's not clear exactly what you want, but

var tmp = unitOfWork.Repository<User>().Queryable();

should give you IQueryable<User> on which you can apply Where conditions, but you'll get result of User collection or object.

unitOfWork.Repository<User>().Queryable().Where(e => 
    e.AccountId == AccountId &&
    e.Email.EmailID == EmailID
);

If you want Email you should either load the Email with User object above or apply your condition on unitOfWork.Repository<Email>().Queryable();

Answer 2

I found that if I use the following it works for me.

Result = searchQuery.Any(e =>
                    e.AccountId == AccountId &&
                    e.Email.Any(f => f.Id == EmailId);