Module: ApplicationEnumeration

Defined in:
lib/application_enumeration.rb

Overview

Methods for enumerating models, tables, columns etc.

!! If you think that a method belongs here chances are it already exists in a Rails extension.

Note the use of Module.nesting (urbanautomaton.com/blog/2013/08/27/rails-autoloading-hell/)

Class Method Summary collapse

Class Method Details

.all_submodels(klass) ⇒ Array of Classes

!! See the built in self.descendants for actual inheritance tracking, this is path based. Used in Ranks.

Parameters:

  • klass (Object)

Returns:

  • (Array of Classes) —

    all models in the /app/models/#klassklass.name (not necessarily inheriting)



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# File 'lib/application_enumeration.rb', line 82

def self.all_submodels(klass)
  Dir.glob(Rails.root + "app/models/#{klass.name.underscore}/**/*.rb").collect{|a| self.model_from_file_name(a) }
end

.alternate_value_attributes(object) ⇒ Array

Returns a list symbols that represent populated, non “cached”, non “_id”, non reserved attributes.

Returns:

  • (Array) —

    a list symbols that represent populated, non “cached”, non “_id”, non reserved attributes



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# File 'lib/application_enumeration.rb', line 25

def self.alternate_value_attributes(object)
  if object.class::ALTERNATE_VALUES_FOR.blank?
    raise("#{object.class} attempted to annotate a class without ALTERNATE_VALUES_FOR -  please inform the programmers")
  else
    object.attributes.select{|k,v| v.present? && object.class::ALTERNATE_VALUES_FOR.include?(k.to_sym)}.keys.map(&:to_sym)
  end
end

.annotatable_attributes(object) ⇒ Array of Symbols

!! Some models have blacklists (e.g. Serial)

Parameters:

  • object (Object)

Returns:

  • (Array of Symbols) —

    a whitelist of the attributes of a given instance that may be annotated



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# File 'lib/application_enumeration.rb', line 37

def self.annotatable_attributes(object)
  object.attributes.select{|k,v| v.present? && !(k =~ /.*_id\z|cached_*.*/)}.keys.map(&:to_sym) - ( RESERVED_ATTRIBUTES - [:parent_id])
end

.attributes(target) ⇒ Array of Symbol

Returns a list attributes except “id”, ‘md5_“, and postfixed ”_id“, ”_at“ This is an arbitrary convention, wrap this to further refine.

Parameters:

Returns:

  • (Array of Symbol) —

    a list attributes except “id”, ‘md5_“, and postfixed ”_id“, ”_at“ This is an arbitrary convention, wrap this to further refine.



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# File 'lib/application_enumeration.rb', line 19

def self.attributes(target)
   target.attributes.select{|k,v| !(k =~ /\Amd5_|_id\z|\Aid\z|_at\z/)}.symbolize_keys.keys.sort
end

.community_data_classes ⇒ Array

Returns all superclass models that are community/shared.

Returns:

  • (Array) —

    all superclass models that are community/shared



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# File 'lib/application_enumeration.rb', line 61

def self.community_data_classes
  superclass_models.select{|a| a < Shared::SharedAcrossProjects }
end

.community_models ⇒ Array

Returns all superclass data models.

Returns:

  • (Array) —

    all superclass data models



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# File 'lib/application_enumeration.rb', line 73

def self.community_models
  superclass_models.select{|a| a < Shared::SharedAcrossProjects}
end

.data_models ⇒ Array

Returns all superclass data models.

Returns:

  • (Array) —

    all superclass data models



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# File 'lib/application_enumeration.rb', line 67

def self.data_models
  superclass_models.select{|a| a < Shared::IsData}
end

.klass_reflections(klass, relationship_type = :has_many) ⇒ Object

Returns Array of AR associations to access the related class use ‘.klass`.

Returns:

  • Array of AR associations to access the related class use ‘.klass`



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# File 'lib/application_enumeration.rb', line 104

def self.klass_reflections(klass, relationship_type = :has_many)
  a = klass.reflect_on_all_associations(relationship_type).sort{ |a, b| a.name <=> b.name }
  a
end

.model_from_file_name(file_name) ⇒ Class

e.g. given ‘app/models/specimen.rb’ the Specimen class is returned

Parameters:

  • file_name (String)

Returns:

  • (Class) —

    represented by a path included filename from /app/models.



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# File 'lib/application_enumeration.rb', line 90

def self.model_from_file_name(file_name)
  file_name.split(/app\/models\//).last[0..-4].split(/\\/).collect{|b| b.camelize}.join('::').safe_constantize
end

.nested_subclasses(parent = self) ⇒ Hash

Parameters:

  • parent (Object) (defaults to: self)

Returns:

  • (Hash) 


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# File 'lib/application_enumeration.rb', line 96

def self.nested_subclasses(parent = self)
  parent.subclasses.inject({}) { | hsh, subclass |
    hsh.merge!(subclass.name => nested_subclasses(subclass))
  }
end

.non_project_data_classes ⇒ Array of Classes

Returns data models that do not have a project_id attribute.

Returns:

  • (Array of Classes) —

    data models that do not have a project_id attribute



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# File 'lib/application_enumeration.rb', line 55

def self.non_project_data_classes
  data_models - project_data_classes
end

.project_data_classes ⇒ Array of Classes

Returns all models with a project_id attribute.

Returns:

  • (Array of Classes) —

    all models with a project_id attribute



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# File 'lib/application_enumeration.rb', line 49

def self.project_data_classes
  superclass_models.select{|a| a.column_names.include?('project_id') }
end

.relation_targets_community?(relation) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/application_enumeration.rb', line 109

def self.relation_targets_community?(relation)
  case relationship_type(relation)
  when :has_many
    relation.class_name.safe_constantize.is_community?
  when :has_one
    raise TaxonWorks::Error, "Has one support not implemented in unify, throw eggs at the devs."
  when :belongs_to
    if k = relation.options[:class_name]
      k.safe_constantize.is_community?
    else
      raise TaxonWorks::Error, "Missing attribute class_name on #{relation.name}."
    end
  end
end

.relationship_type(relation) ⇒ Object

collection?, has_mone? belongs_to?

Raises:

  • (TaxonWorks::Error) 


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# File 'lib/application_enumeration.rb', line 125

def self.relationship_type(relation)
  if relation.collection? # class.name.match('HasMany')
    return :has_many
  elsif relation.has_one? # class.name.match('HasOne')
    return :has_one
  elsif relation.belongs_to? # class.name.match('BelongsTo')
    return :belongs_to
  end

  raise TaxonWorks::Error, "Unknown relationship type for #{relation.name}."
end

.superclass_models ⇒ Array

Returns all models that inherit directly from ApplicationRecord.

Returns:

  • (Array) —

    all models that inherit directly from ApplicationRecord



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# File 'lib/application_enumeration.rb', line 43

def self.superclass_models
  ApplicationRecord.descendants.select{|a| a.superclass == ApplicationRecord }
end