Class: Scopiform::ScopeContext

Inherits:
Object
  • Object
show all
Defined in:
lib/scopiform/scope_context.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ScopeContext

Returns a new instance of ScopeContext.



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# File 'lib/scopiform/scope_context.rb', line 19

def initialize
  @joins = []
  @ancestors = []
  @scopes = []
  @has_manys = []
end

Instance Attribute Details

#ancestors ⇒ Object

Returns the value of attribute ancestors.



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# File 'lib/scopiform/scope_context.rb', line 3

def ancestors
  @ancestors
end

#arel_table ⇒ Object

Returns the value of attribute arel_table.



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# File 'lib/scopiform/scope_context.rb', line 3

def arel_table
  @arel_table
end

#association ⇒ Object

Returns the value of attribute association.



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# File 'lib/scopiform/scope_context.rb', line 3

def association
  @association
end

#association_arel_table ⇒ Object

Returns the value of attribute association_arel_table.



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# File 'lib/scopiform/scope_context.rb', line 3

def association_arel_table
  @association_arel_table
end

#has_manys ⇒ Object

Returns the value of attribute has_manys.



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# File 'lib/scopiform/scope_context.rb', line 3

def has_manys
  @has_manys
end

#joins ⇒ Object

Returns the value of attribute joins.



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# File 'lib/scopiform/scope_context.rb', line 3

def joins
  @joins
end

#scopes ⇒ Object

Returns the value of attribute scopes.



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# File 'lib/scopiform/scope_context.rb', line 3

def scopes
  @scopes
end

Class Method Details

.from(ctx) ⇒ Object 



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# File 'lib/scopiform/scope_context.rb', line 5

def self.from(ctx)
  created = new

  if ctx
    created.set(ctx.arel_table)
    created.association = ctx.association
    created.association_arel_table = ctx.association_arel_table
    created.joins = ctx.joins
    created.ancestors = [*ctx.ancestors]
  end

  created
end

Instance Method Details

#alias_name ⇒ Object 



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# File 'lib/scopiform/scope_context.rb', line 63

def alias_name
  ancestors.join('_').downcase
end

#build_joins ⇒ Object 



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# File 'lib/scopiform/scope_context.rb', line 32

def build_joins
  loop do
    if association.through_reflection
      source_reflection_name = association.source_reflection_name
      self.association = association.through_reflection
    end

    unless association.has_one? || association.belongs_to?
      has_manys << association.name
    end

    ancestors << association.name.to_s.pluralize
    self.association_arel_table = association.klass.arel_table.alias(alias_name)

    joins << create_join

    if association.scope.present? && association.scope.arity.zero?
      association.klass.scopiform_ctx = ScopeContext.from(self).set(association_arel_table)
      scopes << association.klass.instance_exec(&association.scope)
      association.klass.scopiform_ctx = nil
    end

    break if source_reflection_name.blank?

    self.association = association.klass.reflect_on_association(source_reflection_name)
    self.arel_table = association_arel_table
  end

  joins
end

#set(arel_table) ⇒ Object 



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# File 'lib/scopiform/scope_context.rb', line 26

def set(arel_table)
  @arel_table = arel_table

  self
end