Rails SQL Query返回count = 0作为count = 1

Question

我有以下SQL

SELECT distinct loan_cases.case_status, count(loan_applications.id) 
FROM "loan_cases" 
LEFT JOIN case_statuses 
  ON loan_cases.id = case_statuses.loan_case_id 
LEFT JOIN loan_applications 
  ON case_statuses.loan_application_id = loan_applications.id 
GROUP BY loan_cases.case_status;

这是我的结果集

        case_status          | count 
------------------------------+-------
 Completed (End)              |    28
 Need Special Attention       |     0
 Failed (End)                 | 11209
 Pending Submission           |  1720
 Pending Acceptance           |    12
 New                          |     2
 Pending Follow Up Call       |     2
 Pending Invoicing            |    63
 Submitted Requires Follow Up |     0
 Pending Evaluation           |    11
 Drop Off (End)               |   566

当我运行相同的查询rails方式

LoanCase.joins("LEFT JOIN case_statuses ON loan_cases.id = case_statuses.loan_case_id LEFT JOIN loan_applications ON case_statuses.loan_application_id = loan_applications.id").group("loan_cases.case_status").select("distinct loan_cases.case_status, count(loan_applications_views.id)").size

它返回此

=> {"Submitted Requires Follow Up"=>1,
 "Pending Evaluation"=>11,
 "Need Special Attention"=>1,
 "Failed (End)"=>11209,
 "Pending Submission"=>1720,
 "New"=>2,
 "Drop Off (End)"=>566,
 "Pending Invoicing"=>63,
 "Completed (End)"=>28,
 "Pending Follow Up Call"=>2,
 "Pending Acceptance"=>12}

为什么将count = 0更改为count = 1？

有任何帮助表示赞赏吗？