Rails query interface where clause issue?

问题

i am try to run the sql query as follows

@applicants = Applicant.where("applicants.first_name LIKE ? AND applicants.status = ?", "%#{people}%", ["new", "in-review"] )

I am getting an mysql error as :

ActionView::Template::Error (Mysql2::Error: Operand should contain 1 column(s): SELECT `applicants`.* FROM `applicants`  WHERE (applicants.first_name LIKE '%sh%' AND applicants.status = 'new','in-review')):

can anyone help me in this
thanks in advance

回答1:

You have to use IN clause of mysql

@applicants = Applicant.where("applicants.first_name LIKE ? AND 
                               applicants.status in (?)", 
                               "%#{people}%", ["new", "in-review"] )

回答2:

If you want pass an array it should be better to write

@applicants = Applicant
    .where("applicants.first_name LIKE ?", "%#{people}%")
    .where(status: ["new", "in-review"])

Or use squeel gem.

@applicants = Applicant.where{ (status.in(["new", "in-review"]) & (first_name =~ "%#{people}%") }

来源：https://stackoverflow.com/questions/16579238/rails-query-interface-where-clause-issue