Module: QuantumFields::NoSqlize

Extended by:
ActiveSupport::Concern
Defined in:
lib/quantum_fields/no_sqlize.rb

Overview

Module to enable virtual methods in moduls, it creates necessary methods to simulate the behavior that any field can exist, getting or setting it is like a migrated column behaves.

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(meth, *args, &block) ⇒ Object

Overriding ‘method_missing` does the magic of assigning an absent field into `.parameters` JSON as a key-value pair, or recovering it’s value if exists.



12
13
14
15
16
17
18
19
20
21
 
# File 'lib/quantum_fields/no_sqlize.rb', line 12

def method_missing(meth, *args, &block)
  if can_no_sqlize?
    no_sqlize!(meth, *args, &block)
  else
    raise NotImplementedError,
          "#{model.table_name} should have a `#{fields_column}` JSON column"
  end
rescue StandardError
  super
end

Instance Method Details

#_assign_attribute(key, value) ⇒ Object

Overriding a ActiveRecord method that is used in ‘.create` and `.update` methods to assign a value into an attribute.



35
36
37
38
39
 
# File 'lib/quantum_fields/no_sqlize.rb', line 35

def _assign_attribute(key, value)
  initialize_fields
  public_send("#{key}=", value) ||
    try(fields_column).try(:except!, key.to_s)
end

#respond_to_missing?(method_name, include_private = false) ⇒ Boolean

Used to map which methods can be called in the instance, it is based on the premisse that you can always assign a value to any field and recover only existing fields or the ones that are in the ‘.parameters` JSON.

Returns:

  • (Boolean) 


26
27
28
29
30
31
 
# File 'lib/quantum_fields/no_sqlize.rb', line 26

def respond_to_missing?(method_name, include_private = false)
  meth = method_name.to_s
  can_no_sqlize? && meth.ends_with?('=') || meth.ends_with?('changed?') ||
    try(fields_column).try(:[], meth).present? ||
    super
end