Class: ActsAsCalculatorEditor::DeleteLookupTable

Inherits:
Object
  • Object
show all
Defined in:
lib/acts_as_calculator_editor/delete_lookup_table.rb

Overview

Nothing in the schema stops a lookup table from being deleted out from under a formula that reads it: a variable names its table by key, not by foreign key, so there is no constraint to lean on and MissingLookupTableError would only surface at the next calculation.

ImportLookupTable refuses to rewrite brackets an active or retired version resolved to, for the reason that rewriting them retroactively changes what an audited calculation was measured against. Deleting the table is the same act with a worse ending, so it gets the same guard and the same error class — reusing FindLookupTableReferences rather than approximating it, since which table a formula resolves to depends on owner shadowing and cannot be answered by matching keys.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(lookup_table:) ⇒ DeleteLookupTable

Returns a new instance of DeleteLookupTable.



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# File 'lib/acts_as_calculator_editor/delete_lookup_table.rb', line 20

def initialize(lookup_table:)
  @lookup_table = lookup_table
end

Class Method Details

.call ⇒ Object 



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# File 'lib/acts_as_calculator_editor/delete_lookup_table.rb', line 16

def self.call(...)
  new(...).call
end

Instance Method Details

#call ⇒ Object

Raises:

  • (ActsAsCalculator::LookupTableInUseError) 


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# File 'lib/acts_as_calculator_editor/delete_lookup_table.rb', line 24

def call
  raise ActsAsCalculator::LookupTableInUseError, in_use_message unless references.empty?

  lookup_table.destroy!
  lookup_table
end