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[Bug 882036] Re: Incorrect float rounding when setting float field with too high precision

To: credativ@xxxxxxxxxxxxxxxxxxx
From: Lorenzo Battistini - Agile BG - Domsense <lorenzo.battistini@xxxxxxxxxxx>
Date: Sat, 03 Dec 2011 10:38:00 -0000
Reply-to: Bug 882036 <882036@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Hi all,
maybe you want to share your views on this
https://code.launchpad.net/~openerp-dev/openobject-server/trunk-float-rounding-odo/+merge/82206

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https://bugs.launchpad.net/bugs/882036

Title:
  Incorrect float rounding when setting float field with too high
  precision

Status in OpenERP GTK Client:
  Confirmed
Status in OpenERP Server:
  Confirmed
Status in OpenERP Server 6.0 series:
  Confirmed

Bug description:
  Concerns 6.0 and trunk.
  If you define a precision of 0.01, the rounding of 0.125 must be 0.13 and not 0.12. The error is in the call of the format string "%.2f"%val which introduces a mathematical error. The round function must be called to apply the correct rounding before formatting the string. It should be:
  "%.2f"%round(val*100)/100
  Fix class digits_change of class float in the server. BUT fix also the gtk client AND web client as they all have that error (I let you find the right line)

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