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 38

def columns
  @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 43

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 48

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 53

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 58

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 63

def truncate
  nil
end

#update(v = {}) ⇒ Object

Return 0 without sending a database query.



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# File 'lib/sequel/extensions/null_dataset.rb', line 68

def update(v={})
  0
end