Exception: FlexColumns::Errors::IncorrectlyEncodedStringInDatabaseError

Inherits:
InvalidDataInDatabaseError show all
Defined in:
lib/flex_columns/errors.rb

Overview

Raised when the string stored in the database is not correctly encoded. We check for this situation before we even try to parse the string as JSON, because the kind of errors you get from this problem are otherwise maddeningly difficult to deal with – partly because the exceptions themselves often end up with bad encoding.

This class does a lot of work to filter out invalid characters, show them just as hex, and show you where into the string they occur. This is, again, so we don’t make things worse by raising an exception with invalid characters in its message, and so that you can figure out where the problems are.

Instance Attribute Summary collapse

Attributes inherited from InvalidDataInDatabaseError

#additional_message, #data_source, #raw_string

Instance Method Summary collapse

Constructor Details

#initialize(data_source, raw_string) ⇒ IncorrectlyEncodedStringInDatabaseError

Returns a new instance of IncorrectlyEncodedStringInDatabaseError.



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# File 'lib/flex_columns/errors.rb', line 185

def initialize(data_source, raw_string)
  @raw_data_as_array = raw_string.chars.to_a
  @valid_chars_as_array = [ ]
  @invalid_chars_as_array = [ ]
  @raw_data_as_array.each_with_index do |c, i|
    if (! c.valid_encoding?)
      @invalid_chars_as_array << c
      @first_bad_position ||= i
    else
      @valid_chars_as_array << c
    end
  end
  @first_bad_position ||= :unknown

  super(data_source, @valid_chars_as_array.join)
end

Instance Attribute Details

#first_bad_position ⇒ Object (readonly)

Returns the value of attribute first_bad_position.



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# File 'lib/flex_columns/errors.rb', line 183

def first_bad_position
  @first_bad_position
end

#invalid_chars_as_array ⇒ Object (readonly)

Returns the value of attribute invalid_chars_as_array.



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# File 'lib/flex_columns/errors.rb', line 183

def invalid_chars_as_array
  @invalid_chars_as_array
end

#raw_data_as_array ⇒ Object (readonly)

Returns the value of attribute raw_data_as_array.



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# File 'lib/flex_columns/errors.rb', line 183

def raw_data_as_array
  @raw_data_as_array
end