Class: Pluckr::Result::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/pluckr/result/builder.rb

Overview

Turns one flat database row into nested result objects.

Result classes and per-column casters are built once per schema level when the builder is created, so hydration itself is hash lookups plus a cast.

Defined Under Namespace

Classes: Caster

Constant Summary collapse

BOOLEAN = 
ActiveModel::Type::Boolean.new
INTEGER = 
ActiveModel::Type::Integer.new
DECIMAL =

AVG of an integer column is not an integer; ActiveRecord answers a BigDecimal here and so does Pluckr.

ActiveRecord::Type::Decimal.new

Instance Method Summary collapse

Constructor Details

#initialize(schema, label: "Pluckr::Result") ⇒ Builder

Returns a new instance of Builder.



27
28
29
30
31
32
 
# File 'lib/pluckr/result/builder.rb', line 27

def initialize(schema, label: "Pluckr::Result")
  @schema = schema
  @classes = {}
  @casters = {}
  prepare(schema, label)
end

Instance Method Details

#build(row) ⇒ Object

Parameters:

  • row (Hash) —

    flat row keyed by SQL alias



35
36
37
 
# File 'lib/pluckr/result/builder.rb', line 35

def build(row)
  hydrate(@schema, [], row)
end