Ruby Validation When Adding to Database - ruby-on-rails

Question

I am really new in Ruby and I am on the last step to finish my project, when I'm trying to add appointment I have to change if doctor works in that time. I don't know how to do this :(
It is how my db works:
In appointment I have data_wizyty (visit_date), doctor_id and godzina_wizyty(visit_time) - it is in my adding form.
In schedules I have:
dzien_tygodnia(day_of_the_week), poczatek_pracy(start_working), koniec_pracy(end_working) and doctors_workplace_id
In doctors_workplace:
doctor_id, schedule_id, clinic_id
I want to check if doctor is available in any of the clinic in choosen date and time :)
Please help me with this :)
I have already validated if date and time is unique with:
class Appointment < ActiveRecord::Base
validates :doctor_id, uniqueness: { scope: [:data_wizyty, :godzina_wizyty], message: 'Ten termin jest juz zajety!' }
end
I need to check if it is unique and if doctor works.
Appointment:
class Appointment < ActiveRecord::Base
validates :doctor_id, uniqueness: { scope: [:data_wizyty, :godzina_wizyty], message: 'Ten termin jest juz zajety!' }
after_initialize :aInit
after_save :aSave
belongs_to :patient
belongs_to :doctor
belongs_to :schedule
belongs_to :refferal
belongs_to :clinic
has_many :employees
include MultiStepModel
def self.total_steps
3
end
def aInit
#wymaga_Potwierdzenia = true
end
def aSave
if self.refferal_id == nil
#potwierdzona = false
else
#potwierdzona = true
end
if self.wymaga_Potwierdzenia == false
#potwierdzona = true
end
end
end
Schedule:
class Schedule < ActiveRecord::Base
has_many :appointments
belongs_to :clinic
belongs_to :doctors_workplace
def full_schedule
"#{dzien_tygodnia} : #{poczatek_pracy} - #{koniec_pracy}"
end
end
Doctors_workplace:
class DoctorsWorkplace < ActiveRecord::Base
has_many :schedules
belongs_to :doctor
belongs_to :clinic_surgery
end
Now I have something like this :
def check_doctor_available
if Schedule.where(doctor: doctor, dzien_tygodnia: data_wizyty.wday)
.where('poczatek_pracy < ? and koniec_pracy > ?', godzina_wizyty, godzina_wizyty).empty?
self.errors.add(:doctor, message: 'nie pracuje w tym terminie!')
end
It's what I have now:
def check_doctor_available
if DoctorsWorkplace.where(doctor_id: doctor_id) and
Schedule.where(doctors_workplace_id: ????, dzien_tygodnia: data_wizyty.wday)
.where('poczatek_pracy < ? and koniec_pracy > ?', godzina_wizyty, godzina_wizyty).empty?
self.errors.add(:doctor, message: 'nie pracuje w tym terminie!')
end

Answer 1

You can use a custom validation. Create a private method in appointment that checks if the doctor is available at the given date/time.
validate :check_doctor_available
private
def check_doctor_available
#your implementation
end
Take a look at this if you have any doubts what to write in your custom validation method.