Facing issue NoMethodError (undefined method `include' for "56":String): - ruby-on-rails

Question

I am facing issue while writing this code
def sim_state
sim_employees = SimEmployee.find(params[:id].include(:employees))
respond_to do |format|
format.js {
render :layout => false,
:locals => {
:sim_employees => sim_employee
}
}
end
end
and in my sim_states.js.erb
$('#simState').text('<%= sim_employee.employees.app_state%>');
So it gives me this error
NoMethodError (undefined method `include' for "56":String):
when i use it with includes then it gives
undefined method `includes'
Please guide me how to solve this.

Answer 1

The reason is simple
params[:id]
is return you a String value which is "56" and includes works with ActiveRecord::Relation and not string. So you are not able to fire the query that ways.
SimEmployee.find(params[:id])
This will return again a result and not relation. Try using
SimEmployee.where(id: params[:id]).includes(:employees).first
This should help you.
PS : Using includes for one record is same as firing two independent queries i.e.
#sim_employee = SimEmployee.find(params[:id])
#emplyess = #sim_employee.employees

Answer 2

There is a simple solution for this:
SimEmployee.includes(:employees).find params[:id]

Answer 3

SimEmployee.find(params[:id].include(:employees))
This line is causing the issue, you are calling include(:employees) on params[:id] which would be a number.
And you can't actually do .find(params[:id].include(:employees) because find method returns an instance of Model class, in this case, an instance of SimEmployee class, and you can't run method include on it.
Edit:
SimEmployee.includes(:employees).where()
You can pass a hash in where(). This works if your SimEmployee model has has_many relation to Employee model.