From: Mike Harris <GENIE@...>
Date: 2006-07-29T00:02:08+09:00
Subject: Re: Mongoose 0.2.5 - The "Two Steps Forward, One Step Back" release

Jamey Cribbs wrote:

> Mike Harris wrote:
>
>> That would be awesome.  I didn't mean to be "demanding" anything, 
>> you're obviously doing this for free.  I appreciate your help, and if 
>> I come up with anything today, I'll send off another e-mail.
>>
>
> Hey, no problem.  I appreciate you taking the time to try out Mongoose 
> and give me feedback.
>
> By the way, I did glance at the code and I think I might have found 
> the problem.  Each record is marshaled to disk as an array.  When I 
> read a record back from disk, I do a #flatten on it before creating 
> the object.  That's probably where the problem is, since #flatten is 
> recursive, it's going to flatten both the record's array, and the 
> array you stored in one of the fields.
>
> So, I will try changing this code to not use #flatten and see if what 
> happens.
>
> Jamey
>
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>
I noticed that, actually did a search for "flatten," but I don't think 
that's it.  I was able to do [1,2] successfully, but not (1..9).to_a.  I 
think it's when the array gets long enough to neccesitate a carriage 
return in the marshal, and when it gets read back there's a CR and an 
LF, instead of just a CR or LF (I forget which), in addition to the 
missing \016 at the end.  I've been poking it, ran a little "test" with 
some output.  This probably won't help you but here it is.  It's storing 
Marshal.dump((1..9).to_a) to the str column

Orig Dump:        \4 \8 [ \14 i \6 i \7 i \8 i \9 i \10 i \11 i \12 i \n 
i \14
 From DB File 1: \4 \8 [ \14 i \6 i \7 i \8 i \9 i \10 i \11 i \12 i \n 
i \14
 From DB:          \4 \8 [ \14 i \6 i \7 i \8 i \9 i \n \10 i \11 i \12 
i \n i

the \ characters are the decimal number for the unprintable characeters
Orig Dump is Marshal.dump((1..9).to_a)
 From DB File is a manual read from the database file, without using 
Mongoose to read
 From DB is find.first.str

I've got to get back to my "job," but I'll whip up some test cases later.