Class: ROM::SQL::Association::Name

Inherits:
Object
  • Object
show all
Extended by:
Dry::Core::Cache
Defined in:
lib/rom/sql/association/name.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(relation_name, aliaz) ⇒ Name

Returns a new instance of Name.



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# File 'lib/rom/sql/association/name.rb', line 37

def initialize(relation_name, aliaz)
  @relation_name = relation_name
  @aliased = relation_name.dataset != aliaz
  @key = aliased? ? aliaz : relation_name.dataset
end

Instance Attribute Details

#key ⇒ Object (readonly) Also known as: to_sym 



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# File 'lib/rom/sql/association/name.rb', line 15

def key
  @key
end

#relation_name ⇒ Object (readonly) 



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# File 'lib/rom/sql/association/name.rb', line 13

def relation_name
  @relation_name
end

Class Method Details

.[](*args) ⇒ Object 



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# File 'lib/rom/sql/association/name.rb', line 19

def self.[](*args)
  fetch_or_store(args) do
    rel, ds, aliaz = args

    if rel.is_a?(ROM::Relation::Name)
      new(rel, rel.dataset)
    elsif rel.is_a?(self)
      rel
    elsif aliaz
      new(ROM::Relation::Name[rel, ds], aliaz)
    elsif ds.nil?
      new(ROM::Relation::Name[rel], rel)
    else
      new(ROM::Relation::Name[rel, ds], ds)
    end
  end
end

Instance Method Details

#aliased? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rom/sql/association/name.rb', line 43

def aliased?
  @aliased
end

#as(aliaz) ⇒ Object 



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# File 'lib/rom/sql/association/name.rb', line 64

def as(aliaz)
  Name[relation_name.relation, relation_name.dataset, aliaz]
end

#dataset ⇒ Object 



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# File 'lib/rom/sql/association/name.rb', line 56

def dataset
  relation_name.dataset
end

#inspect ⇒ Object Also known as: to_s 



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# File 'lib/rom/sql/association/name.rb', line 47

def inspect
  if aliased?
    "#{self.class}(#{relation_name.to_s} as #{key})"
  else
    "#{self.class}(#{relation_name.to_s})"
  end
end

#relation ⇒ Object 



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# File 'lib/rom/sql/association/name.rb', line 60

def relation
  relation_name.relation
end

#sql_literal(ds) ⇒ Object 



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# File 'lib/rom/sql/association/name.rb', line 72

def sql_literal(ds)
  ds.literal(aliased? ? Sequel[dataset] : Sequel.as(dataset, key))
end