Class: Perpetuity::Postgres::Table::Attribute

Inherits:
Object
  • Object
show all
Defined in:
lib/perpetuity/postgres/table/attribute.rb

Constant Summary collapse

NoDefaultValue = 
Module.new
UUID = 
Module.new
SQL_TYPE_MAP = 
{
  String => 'TEXT',
  Integer => 'BIGINT',
  Fixnum =>  'BIGINT',
  Bignum =>     'NUMERIC',
  BigDecimal => 'NUMERIC',
  Float => 'FLOAT',
  UUID => 'UUID',
  Time => 'TIMESTAMPTZ',
  Date => 'DATE',
  TrueClass => 'BOOLEAN',
  FalseClass => 'BOOLEAN'
}.tap{|m| m.default = 'JSON' }

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, type, options = {}) ⇒ Attribute

Returns a new instance of Attribute.



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# File 'lib/perpetuity/postgres/table/attribute.rb', line 26

def initialize name, type, options={}
  @name = name
  @type = type
  @max_length = options[:max_length]
  @primary_key = if @name.to_s == 'id'
                   true
                 else
                   options.fetch(:primary_key) { false }
                 end
  @default = options.fetch(:default) { NoDefaultValue }
end

Instance Attribute Details

#max_length ⇒ Object (readonly)

Returns the value of attribute max_length.



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# File 'lib/perpetuity/postgres/table/attribute.rb', line 7

def max_length
  @max_length
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/perpetuity/postgres/table/attribute.rb', line 7

def name
  @name
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/perpetuity/postgres/table/attribute.rb', line 7

def type
  @type
end

Instance Method Details

#default ⇒ Object 



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# File 'lib/perpetuity/postgres/table/attribute.rb', line 60

def default
  @default
end

#primary_key? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/perpetuity/postgres/table/attribute.rb', line 56

def primary_key?
  !!@primary_key
end

#sql_declaration ⇒ Object 



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# File 'lib/perpetuity/postgres/table/attribute.rb', line 42

def sql_declaration
  if self.default.is_a? String
    default = "'#{self.default}'"
  else
    default = self.default
  end

  sql = "#{name} #{sql_type}"
  sql << ' PRIMARY KEY' if primary_key?
  sql << " DEFAULT #{default}" unless self.default == NoDefaultValue

  sql
end

#sql_type ⇒ Object 



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# File 'lib/perpetuity/postgres/table/attribute.rb', line 38

def sql_type
  SQL_TYPE_MAP[type]
end