Class: BulkDependencyEraser::FullSchemaParser

Inherits:
Base
  • Object
show all
Defined in:
lib/bulk_dependency_eraser/full_schema_parser.rb

Overview

Create a flat map hash for each class that lists every dependency.

Constant Summary collapse

DEFAULT_OPTS = 
{
  verbose: false,
}

Constants inherited from Base

Base::DEFAULT_DB_BLANK_WRAPPER, Base::DEFAULT_DB_READ_WRAPPER, Base::DEFAULT_DB_WRITE_WRAPPER, Base::DEFAULT_KLASS_MAPPED_SCOPE_WRAPPER, Base::DEFAULT_SCOPE_WRAPPER, Base::DEPENDENCY_DESTROY, Base::DEPENDENCY_DESTROY_IGNORE_REFLECTION_TYPES, Base::DEPENDENCY_NULLIFY, Base::DEPENDENCY_RESTRICT, Base::POLY_KLASS_NAME

Instance Attribute Summary collapse

Attributes inherited from Base

#errors

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#merge_errors, #report_error

Methods included from Utils::Methods

#deep_freeze

Constructor Details

#initialize(opts: {}) ⇒ FullSchemaParser

Returns a new instance of FullSchemaParser.



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# File 'lib/bulk_dependency_eraser/full_schema_parser.rb', line 21

def initialize(opts: {})
  # @flat_dependencies_per_klass Structure
  # {
  #   <class_name> => {
  #     has_dependencies: <Boolean>,
  #     foreign_keys: {
  #       <column_name>: <association_class_name>,
  #       ...
  #     },
  #     nullify_dependencies: {
  #       <association_name>: <association_class_name>,
  #       ...
  #     },
  #     destroy_dependencies: {
  #       <association_name>: <association_class_name>,
  #       ...
  #     }
  #   }
  # }
  @flat_dependencies_per_klass = {}
  super(opts:)
end

Instance Attribute Details

#flat_dependencies_per_klass ⇒ Object (readonly)

Returns the value of attribute flat_dependencies_per_klass.



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# File 'lib/bulk_dependency_eraser/full_schema_parser.rb', line 8

def flat_dependencies_per_klass
  @flat_dependencies_per_klass
end

Class Method Details

.get_cache ⇒ Object 



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# File 'lib/bulk_dependency_eraser/full_schema_parser.rb', line 17

def self.get_cache
  @cached_flat_dependencies_per_klass
end

.reset_cache ⇒ Object 



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# File 'lib/bulk_dependency_eraser/full_schema_parser.rb', line 11

def self.reset_cache
  @cached_flat_dependencies_per_klass = nil
end

.set_cache(value) ⇒ Object 



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# File 'lib/bulk_dependency_eraser/full_schema_parser.rb', line 14

def self.set_cache(value)
  @cached_flat_dependencies_per_klass = value.freeze
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/bulk_dependency_eraser/full_schema_parser.rb', line 44

def execute
  unless self.class.get_cache.nil?
    @flat_dependencies_per_klass = self.class.get_cache
    return true
  end

  Rails.application.eager_load!

  ActiveRecord::Base.descendants.each do |model|
    begin
      next if model.abstract_class? # Skip abstract classes like ApplicationRecord
      next unless model.connection.table_exists?(model.table_name)
    rescue Exception => e
      report_error("EXECPTION ON #{model.name}; #{e.class}: #{e.message}")
      next
    end

    flat_dependencies_parser(model)
  end

  deep_freeze(@flat_dependencies_per_klass)
  self.class.set_cache(@flat_dependencies_per_klass)

  return true
end

#reset ⇒ Object 



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# File 'lib/bulk_dependency_eraser/full_schema_parser.rb', line 70

def reset
  @flat_dependencies_per_klass = {}
  self.class.reset_cache
end