Class: StudentListDB

Inherits:
Object
  • Object
show all
Defined in:
lib/source/student_list_db.rb

Constant Summary collapse

@@instance = 
nil

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ StudentListDB

Returns a new instance of StudentListDB.



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# File 'lib/source/student_list_db.rb', line 14

def initialize
  self.database = StudentDB.new()
end

Instance Attribute Details

#database ⇒ Object

Returns the value of attribute database.



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# File 'lib/source/student_list_db.rb', line 5

def database
  @database
end

Class Method Details

.instance ⇒ Object 



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# File 'lib/source/student_list_db.rb', line 9

def self.instance
  @@instance ||= StudentListDB.new
end

Instance Method Details

#add_student(student) ⇒ Object 



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# File 'lib/source/student_list_db.rb', line 30

def add_student(student)
  database.add_student(student.to_hash)
end

#count ⇒ Object 



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# File 'lib/source/student_list_db.rb', line 38

def count
  database.count
end

#get_student(id) ⇒ Object 



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# File 'lib/source/student_list_db.rb', line 18

def get_student(id)
  Student.from_hash(database.select_by_id(id).transform_keys(&:to_sym))
end

#get_students_pag(k, n, data) ⇒ Object 



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# File 'lib/source/student_list_db.rb', line 34

def get_students_pag(k, n, data)
  database.get_students_pag(k, n, data)
end

#remove_student(id) ⇒ Object 



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# File 'lib/source/student_list_db.rb', line 22

def remove_student(id)
  database.remove_by_id(id)
end

#replace_student(id, student) ⇒ Object 



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# File 'lib/source/student_list_db.rb', line 26

def replace_student(id, student)
  database.replace_by_id(id, student)
end