[ruby-core:90349] [Ruby trunk Bug#15388][Assigned] CSV parsing behaviour in > 2.5.0

[kou@cozmixng.org]

Issue #15388 has been updated by kou (Kouhei Sutou).

Status changed from Open to Assigned
Assignee set to kou (Kouhei Sutou)

Arguments validation may be better but we need more works for it. For example, we need to add similar logic to `CSV.read` for this case.

Anyone who wants to work on argument validation should send pull requests to https://github.com/ruby/csv .

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Bug #15388: CSV parsing behaviour in > 2.5.0
https://bugs.ruby-lang.org/issues/15388#change-75460

* Author: dharshandj@gmail.com (Dharshan Bharathuru)
* Status: Assigned
* Priority: Normal
* Assignee: kou (Kouhei Sutou)
* Target version: 
* ruby -v: 2.5.1
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN
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Hi,

It seems like CSV library in 2.5.0 is not behaving as intended while parsing.

~~~ ruby
header = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q"]

csv_str = "10.4710|859.5170|9000.0000|Y||0.0000||NRM|0||||N|Y|P|NRM|\r\n11.4710|869.5170|9000.0000|Y||0.0000||NRM|0||||N|Y|P|NRM|\r\n"

CSV.parse(csv_str, col_sep: '|', write_headers: true, headers: header)[0]
# produces junk
# #<CSV::Row "A":"0" "B":nil "C":"NRM" "D":"0" "E":nil "F":nil "G":nil "H":"N" "I":"Y" "J":"P" "K":"NRM" "L":nil "M":nil "N":nil "O":nil "P":nil "Q":nil>

~~~

But without `write_headers` option it produces correct parsing.

~~~ ruby
CSV.parse(csv_str, col_sep: '|', headers: header)[0]

# #<CSV::Row "A":"10.4710" "B":"859.5170" "C":"9000.0000" "D":"Y" "E":nil "F":"0.0000" "G":nil "H":"NRM" "I":"0" "J":nil "K":nil "L":nil "M":"N" "N":"Y" "O":"P" "P":"NRM" "Q":nil>

~~~



 



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