Class: PGExaminer::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/pg_examiner/base.rb

Direct Known Subclasses

Result, Result::Item, Result::Table::Permission

Instance Method Summary collapse

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/pg_examiner/base.rb', line 70

def ==(other)
  self.class == other.class && diff(other) == {}
end

#diff(other) ⇒ Object 



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# File 'lib/pg_examiner/base.rb', line 17

def diff(other)
  raise "Can't diff a #{self.class} and a #{other.class}" unless self.class == other.class

  r = {}

  diffable_attrs.each do |attr, description|
    this = @row.fetch(attr)
    that = other.row.fetch(attr)

    unless this == that
      r[description] = {this => that}
    end
  end

  diffable_methods.each do |attr, description|
    this = send(attr)
    that = other.send(attr)

    unless this == that
      r[description] = {this => that}
    end
  end

  diffable_lists.each do |attr, description|
    these = send(attr)
    those = other.send(attr)
    these_names = these.map(&:name)
    those_names = those.map(&:name)

    if these_names == those_names
      result = these.zip(those).each_with_object({}) do |(this, that), hash|
        if (result = this.diff(that)).any?
          hash[this.name] = result
        end
      end

      if result.any?
        r[description] = result
      end
    else
      added   = those_names - these_names
      removed = these_names - those_names

      h = {}
      h['added']   = added.sort   if added.any?
      h['removed'] = removed.sort if removed.any?
      r[description] = h
    end
  end

  r
end

#diffable_attrs ⇒ Object 



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# File 'lib/pg_examiner/base.rb', line 5

def diffable_attrs
  {}
end

#diffable_lists ⇒ Object 



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# File 'lib/pg_examiner/base.rb', line 9

def diffable_lists
  []
end

#diffable_methods ⇒ Object 



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# File 'lib/pg_examiner/base.rb', line 13

def diffable_methods
  []
end