Class: Scheman::Schema

Inherits:

Object

• Object
• Scheman::Schema

Defined in:

lib/scheman/schema.rb

Defined Under Namespace

Classes: Field, Table

Instance Method Summary

• #create_tables ⇒ Array<Hash>

  An array of CREATE TABLE statements.

• #initialize(statements) ⇒ Schema constructor

  A new instance of Schema.

• #table_names ⇒ Array<String>
• #tables ⇒ Array<Scheman::Schema::Table>

  All tables to be created after applying this schema.

• #tables_indexed_by_name ⇒ Hash
• #to_hash ⇒ Object

Constructor Details

#initialize(statements) ⇒ Schema

# File 'lib/scheman/schema.rb', line 3

def initialize(statements)
  @statements = statements
end

Instance Method Details

#create_tables ⇒ Array<Hash>

# File 'lib/scheman/schema.rb', line 12

def create_tables
  @create_tables ||= @statements.select do |statement|
    statement[:create_table]
  end
end

#table_names ⇒ Array<String>

# File 'lib/scheman/schema.rb', line 31

def table_names
  tables.map(&:name)
end

#tables ⇒ Array<Scheman::Schema::Table>

# File 'lib/scheman/schema.rb', line 24

def tables
  @tables ||= create_tables.map do |create_table|
    Table.new(create_table[:create_table])
  end
end

#tables_indexed_by_name ⇒ Hash

# File 'lib/scheman/schema.rb', line 19

def tables_indexed_by_name
  @tables_indexed_by_name ||= tables.index_by(&:name)
end

#to_hash ⇒ Object

# File 'lib/scheman/schema.rb', line 7

def to_hash
  @statements
end