Class: Mxrb::Semantic::ChangeAttributePlan

Inherits:
Object
  • Object
show all
Defined in:
lib/mxrb/semantic/domain_mutator.rb

Overview

Plan that changes an attribute's type, default value, or documentation.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(project:, module_name:, entity_name:, entity_id:, domain_unit_id:, attribute_name:, updates:) ⇒ ChangeAttributePlan

Returns a new instance of ChangeAttributePlan.



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# File 'lib/mxrb/semantic/domain_mutator.rb', line 122

def initialize(project:, module_name:, entity_name:, entity_id:, domain_unit_id:,
               attribute_name:, updates:)
  @project        = project
  @module_name    = module_name
  @entity_name    = entity_name
  @entity_id      = entity_id
  @domain_unit_id = domain_unit_id
  @attribute_name = attribute_name
  @updates        = updates.freeze
  @applied        = false
  desc = updates.map { |k, v| "#{k}: #{v}" }.join(", ")
  @changes = ["change #{module_name}.#{entity_name}/#{attribute_name} (#{desc})"].freeze
end

Instance Attribute Details

#attribute_name ⇒ Object (readonly)

Returns the value of attribute attribute_name.



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# File 'lib/mxrb/semantic/domain_mutator.rb', line 120

def attribute_name
  @attribute_name
end

#changes ⇒ Object (readonly)

Returns the value of attribute changes.



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# File 'lib/mxrb/semantic/domain_mutator.rb', line 120

def changes
  @changes
end

#updates ⇒ Object (readonly)

Returns the value of attribute updates.



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# File 'lib/mxrb/semantic/domain_mutator.rb', line 120

def updates
  @updates
end

Instance Method Details

#applied? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mxrb/semantic/domain_mutator.rb', line 137

def applied? = @applied

#apply! ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/mxrb/semantic/domain_mutator.rb', line 139

def apply!
  raise ArgumentError, "plan was already applied" if @applied

  @project.mpr.transaction do
    raw = @project.raw_unit(@domain_unit_id)
    raise ArgumentError, "domain model unit not found" unless raw

    doc        = @project.parse_bson(raw)
    entities   = DomainMutator.extract_entities(doc)
    entity_doc = entities.find { IO::BsonCodec.extract_id(_1["$ID"] || _1["\$ID"]) == @entity_id }
    raise ArgumentError, "entity not found" unless entity_doc

    attrs    = DomainMutator.extract_attributes(entity_doc)
    attr_doc = attrs.find { (_1["name"] || _1["Name"]).to_s == @attribute_name }
    raise ArgumentError, "attribute #{@attribute_name.inspect} not found on #{@entity_name}" unless attr_doc

    attr_model                 = Model::Attribute.from_bson(attr_doc)
    attr_model.type            = @updates[:type].to_sym       if @updates.key?(:type)
    attr_model.default_value   = @updates[:default].to_s      if @updates.key?(:default)
    attr_model.documentation   = @updates[:documentation].to_s if @updates.key?(:documentation)

    new_attrs = attrs.map { (_1["name"] || _1["Name"]).to_s == @attribute_name ? attr_model.to_bson : _1 }
    DomainMutator.put_attributes(entity_doc, new_attrs)
    DomainMutator.put_entity(doc, @entity_id, entity_doc)
    @project.mpr.update_unit(@domain_unit_id, doc)
  end

  @project.refresh!
  @applied = true
  self
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mxrb/semantic/domain_mutator.rb', line 136

def empty?   = false