class DataObjects::Reader
Abstract class to read rows from a query result
Public Instance Methods
close()
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Close the reader discarding any unread results.
# File lib/data_objects/reader.rb, line 18 def close raise NotImplementedError.new end
each() { |row| ... }
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Yield each row to the given block as a Hash
# File lib/data_objects/reader.rb, line 33 def each begin while next! row = {} fields.each_with_index { |field, index| row[field] = values[index] } yield row end ensure close end self end
field_count()
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Return the number of fields in the result set.
# File lib/data_objects/reader.rb, line 28 def field_count raise NotImplementedError.new end
fields()
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Return the array of field names
# File lib/data_objects/reader.rb, line 8 def fields raise NotImplementedError.new end
next!()
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Discard the current row (if any) and read the next one (returning true), or return nil if there is no further row.
# File lib/data_objects/reader.rb, line 23 def next! raise NotImplementedError.new end
values()
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Return the array of field values for the current row. Not legal after next! has returned false or before it's been called
# File lib/data_objects/reader.rb, line 13 def values raise NotImplementedError.new end