Class: Restforce::DB::AttributeMaps::Database

Inherits:
Object
  • Object
show all
Defined in:
lib/restforce/db/attribute_maps/database.rb

Overview

Restforce::DB::AttributeMaps::Database encapsulates the logic for compiling and parsing normalized attribute hashes from/for ActiveRecord objects.

Instance Method Summary collapse

Constructor Details

#initialize(fields, adapter = Adapter.new) ⇒ Database

Public: Initialize a Restforce::DB::AttributeMaps::Database.

fields - A Hash of mappings between database columns and fields in

Salesforce.

adapter - An adapter object which should be used to convert between

data formats.



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# File 'lib/restforce/db/attribute_maps/database.rb', line 18

def initialize(fields, adapter = Adapter.new)
  @fields = fields
  @adapter = adapter
end

Instance Method Details

#attributes(record) ⇒ Object

Public: Build a normalized Hash of attributes from the appropriate set of mappings. The keys of the resulting mapping Hash will correspond to the Salesforce field names.

record - The underlying ActiveRecord object for which attributes

should be collected.

Returns a Hash.



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# File 'lib/restforce/db/attribute_maps/database.rb', line 31

def attributes(record)
  attributes = @fields.keys.each_with_object({}) do |attribute, values|
    values[attribute] = record.send(attribute)
  end
  attributes = @adapter.from_database(attributes)

  @fields.each_with_object({}) do |(attribute, mapping), final|
    final[mapping] = attributes[attribute]
  end
end

#convert(attributes) ⇒ Object

Public: Convert a Hash of normalized attributes to a format suitable for consumption by an ActiveRecord object.

attributes - A Hash of attributes, with keys corresponding to the

normalized Salesforce attribute names.

Examples

attribute_map = AttributeMaps::Database.new(
  some_key: "SomeField__c",
)

attribute_map.convert(MyClass, "Some_Field__c" => "some value")
# => { some_key: "some value" }

Returns a Hash.



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# File 'lib/restforce/db/attribute_maps/database.rb', line 58

def convert(attributes)
  attributes = @fields.each_with_object({}) do |(attribute, mapping), converted|
    next unless attributes.key?(mapping)
    converted[attribute] = attributes[mapping]
  end

  @adapter.to_database(attributes)
end