Class: PgGraph::Type::TableColumn

Inherits:
Column show all
Defined in:
lib/pg_graph/type/type.rb,
lib/pg_graph/type/dump_type.rb

Direct Known Subclasses

MmTableColumn

Instance Attribute Summary collapse

Attributes inherited from Column

#postgres_column

Attributes inherited from Field

#type

Instance Method Summary collapse

Methods inherited from Column

#dump, #generated?, #identity?, #kind?, #nullable?, #primary_key?, #readonly?, #reference?, #unique?

Methods included from TableObject

#record_type, #table, #table_type

Methods inherited from Field

#identifier, #schema_identifier

Methods inherited from Node

#dump, #guid, #identifier, #inspect, #inspect_inner, #schema_identifier

Constructor Details

#initialize(record_type, name, type, this_link_column, that_link_column, **opts) ⇒ TableColumn

Returns a new instance of TableColumn.



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# File 'lib/pg_graph/type/type.rb', line 578

def initialize(record_type, name, type, this_link_column, that_link_column, **opts)
  constrain record_type, RecordType
  constrain type, TableType
  super(record_type, name, nil, type, **opts)
  @this_link_column = this_link_column
  @that_link_column = that_link_column
end

Instance Attribute Details

Postgres column in the subject table that directly or indirectly links to the embedding record. This is typically the ‘<this-table>_id’ column of that table in 1:N relations



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# File 'lib/pg_graph/type/type.rb', line 574

def that_link_column
  @that_link_column
end

#this_link_column ⇒ Object (readonly)

Postgres column in the embedding record that links (directly or indirectly) to the subject table. This is typically the id column



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# File 'lib/pg_graph/type/type.rb', line 569

def this_link_column
  @this_link_column
end

Instance Method Details

#dot_lookup(key) ⇒ Object 



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# File 'lib/pg_graph/type/type.rb', line 586

def dot_lookup(key) type[key] end

#dump_type ⇒ Object 



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# File 'lib/pg_graph/type/dump_type.rb', line 56

def dump_type
  print " (#{this_link_column} -> #{type.table.name}.#{that_link_column}) (TableColumn)"
end