Class: ROM::SQL::Schema::Inferrer

Inherits:
Object
  • Object
show all
Extended by:
ClassMacros
Defined in:
lib/rom/sql/schema/inferrer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dsl) ⇒ Inferrer

Returns a new instance of Inferrer.



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# File 'lib/rom/sql/schema/inferrer.rb', line 23

def initialize(dsl)
  @dsl = dsl
end

Instance Attribute Details

#dsl ⇒ Object (readonly)

Returns the value of attribute dsl.



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# File 'lib/rom/sql/schema/inferrer.rb', line 21

def dsl
  @dsl
end

Instance Method Details

#call(dataset, gateway) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/rom/sql/schema/inferrer.rb', line 28

def call(dataset, gateway)
  columns = gateway.connection.schema(dataset)
  fks = fks_for(gateway, dataset)

  columns.each do |(name, definition)|
    dsl.attribute name, build_type(definition.merge(foreign_key: fks[name]))
  end

  pks = columns
    .map { |(name, definition)| name if definition.fetch(:primary_key) }
    .compact

  dsl.primary_key(*pks) if pks.any?

  dsl.attributes
end