Module: Sequel::Dataset::NullDataset

Defined in:
lib/sequel/extensions/null_dataset.rb

Instance Method Summary collapse

Instance Method Details

#columns ⇒ Object

Create a new dataset from the dataset (which won’t be nulled) to get the columns if they aren’t already cached.



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# File 'lib/sequel/extensions/null_dataset.rb', line 53

def columns
  if cols = _columns
    return cols
  end
  self.columns = db.dataset.clone(@opts).columns
end

#delete ⇒ Object

Return 0 without sending a database query.



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# File 'lib/sequel/extensions/null_dataset.rb', line 61

def delete
  0
end

#each(&_) ⇒ Object

Return self without sending a database query, never yielding.



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# File 'lib/sequel/extensions/null_dataset.rb', line 66

def each(&_)
  self
end

#fetch_rows(sql, &_) ⇒ Object

Return nil without sending a database query, never yielding.



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# File 'lib/sequel/extensions/null_dataset.rb', line 71

def fetch_rows(sql, &_)
  nil
end

#insert ⇒ Object

Return nil without sending a database query.



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# File 'lib/sequel/extensions/null_dataset.rb', line 76

def insert(*)
  nil
end

#truncate ⇒ Object

Return nil without sending a database query.



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# File 'lib/sequel/extensions/null_dataset.rb', line 81

def truncate
  nil
end

#update(v = OPTS) ⇒ Object

Return 0 without sending a database query.



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# File 'lib/sequel/extensions/null_dataset.rb', line 86

def update(v=OPTS)
  0
end