Class: MyActiveRecord::Base

Inherits:
Object
  • Object
show all
Extended by:
ActiveSupport::DescendantsTracker, Associations
Defined in:
lib/my_active_record/base.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Associations

belongs_to, has_many, has_one

Constructor Details

#initialize(params = {}) ⇒ Base

Returns a new instance of Base.



10
11
12
13
14
15
 
# File 'lib/my_active_record/base.rb', line 10

def initialize(params = {})
  params.each do |key, value|
    self[key] = value
  end
  self
end

Class Method Details

.create(params) ⇒ Object 



49
50
51
 
# File 'lib/my_active_record/base.rb', line 49

def create(params)
  new(params).save
end

.fields ⇒ Object 



29
30
31
 
# File 'lib/my_active_record/base.rb', line 29

def fields
  @fields
end

.fields=(fields_list) ⇒ Object 



22
23
24
25
26
27
 
# File 'lib/my_active_record/base.rb', line 22

def fields=(fields_list)
  fields_list.each do |field_name|
    attr_accessor field_name
  end
  @fields = fields_list
end

.find(model_id) ⇒ Object 



33
34
35
 
# File 'lib/my_active_record/base.rb', line 33

def find(model_id)
  where(:id => model_id).first
end

.last ⇒ Object 



53
54
55
 
# File 'lib/my_active_record/base.rb', line 53

def last
  Database.last(table_name)
end

.load_data(data) ⇒ Object 



41
42
43
44
45
46
47
 
# File 'lib/my_active_record/base.rb', line 41

def load_data(data)
  model = new
  fields.each_with_index do |field_name,index|
    model[field_name] = data[index]
  end
  model
end

.table_name ⇒ Object 



18
19
20
 
# File 'lib/my_active_record/base.rb', line 18

def table_name
  name.to_s.demodulize.underscore.pluralize
end

.where(params) ⇒ Object 



37
38
39
 
# File 'lib/my_active_record/base.rb', line 37

def where(params)
  Database.where(table_name, params)
end

Instance Method Details

#[](key) ⇒ Object 



66
67
68
 
# File 'lib/my_active_record/base.rb', line 66

def [](key)
  send(key)
end

#[]=(key, value) ⇒ Object 



70
71
72
 
# File 'lib/my_active_record/base.rb', line 70

def []=(key, value)
  send("#{key}=", value)
end

#save ⇒ Object 



58
59
60
61
62
63
64
 
# File 'lib/my_active_record/base.rb', line 58

def save
  if self.id
    Database.update(self.class.table_name, self)
  else
    Database.insert(self.class.table_name, self)
  end
end

#to_row ⇒ Object 



74
75
76
77
78
 
# File 'lib/my_active_record/base.rb', line 74

def to_row 
  self.class.fields.map do |field|
    self[field]
  end
end