api returning wrong number of posts (limit) - Tumblr API Discussion

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Message from discussion api returning wrong number of posts (limit)
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Date: Thu, 12 Jul 2012 09:57:49 -0400
From: John Bunting <jo...@tumblr.com>
To: tumblr-api@googlegroups.com
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Subject: Re: api returning wrong number of posts (limit)
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Hey Walid,

We are aware of the bug and it's been filed. It's on the road map to fix but some other things have been pushed in front of it.

Thanks for the email! 

-- 
John Bunting

Simplicity is a prerequisite for reliability
   --Edsger W. Dijkstra


On Wednesday, July 11, 2012 at 3:04 AM, Walid Wannous wrote:

> Felix,
> Thank you for your reply. Ill try to work around these bugs. Is there any plan to fix these bugs any soon?
> 
> 
> 
> On Jul 11, 2012, at 7:18 AM, Felix Bonkoski <felixschwer...@gmail.com (mailto:felixschwer...@gmail.com)> wrote:
> 
> > These are know bugs
> > 
> > When you request a limit of X posts, the API may not return exactly X posts.
> > 
> > I think this has to do with posts that have been deleted / marked private on a blog. The API "skips" over them, but instead of filling in the missing posts with more posts, it just returns some number <= X.
> > 
> > As such, you should *never* use the number of posts returned from the .../blog/<host>/posts  call when you set the Offset parameter to fetch more.
> > 
> > Eg,
> > Suppose you fetch offset=0, limit=10  and you get 7 posts back. 
> > On your next call to fetch more posts, you *still use* offset=10, limit=10  and NOT  offset=7, limit=10
> > 
> > 
> > The "total posts" number you refer to is *Not* the number of posts *returned* by the call to .../blog/<host>/posts
> > 
> > It is meant to be the "total number of posts on this blog"
> > 
> > However, *note* there is another known bug here!  The number returned for "Total Posts" is often incorrect!
> > 
> > So do not depend on this number when you are paginating through posts, to determine if you reached the end! 
> > 
> > Felix
> > 
> > 
> > 
> > On Mon, Jul 9, 2012 at 11:17 AM, Walid Wannous <wwann...@koein.com (mailto:wwann...@koein.com)> wrote:
> > > Calling http://api.tumblr.com/v2/blog/toucheydesign.tumblr.com/posts?api_key=9ETjA------------------------------------------JtQewBmeFIM&tag=photography&offset=1&limit=10 
> > > returns only 7 posts in the json although i have specified a limit of 10 and the total posts is 49 as mentioned in the json file.
> > > 
> > 
> > 
> > 
> > 
> > 
> > -- 
> > Felix Bonkoski 


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                <div style=3D=22font-family: Helvetica; font-size: 12px; =
=22>Hey Walid,<div><br></div><div>We are aware of the bug and it's been f=
iled. It's on the road map to fix but some other things have been pushed =
in front of it.</div><div><br></div><div>Thanks for the email=21</div></d=
iv>
                <div><div><br></div><div style=3D=22font-family: Helvetic=
a; font-size: 10pt; =22>--&nbsp;</div><div style=3D=22font-family: Helvet=
ica; font-size: 10pt; =22>John Bunting</div><div style=3D=22font-family: =
Helvetica; font-size: 10pt; =22><br></div><div style=3D=22font-family: He=
lvetica; font-size: 10pt; =22>Simplicity is a prerequisite for reliabilit=
y</div><div style=3D=22font-family: Helvetica; font-size: 10pt; =22>&nbsp=
; &nbsp;--Edsger W. Dijkstra</div><div><br></div></div>
                =20
                <p style=3D=22color: =23A0A0A8;=22>On Wednesday, July 11,=
 2012 at 3:04 AM, Walid Wannous wrote:</p>
                <blockquote type=3D=22cite=22 style=3D=22border-left-styl=
e:solid;border-width:1px;margin-left:0px;padding-left:10px;=22>
                    <span><div><div><div>=46elix,</div><div>Thank you for=
 your reply. Ill try to work around these bugs. Is there any plan to fix =
these bugs any soon=3F<br><br><div><span style=3D=22=22><br>
</span></div></div><div><br>On Jul 11, 2012, at 7:18 AM, =46elix Bonkoski=
 &lt;<a href=3D=22mailto:felixschwermut=40gmail.com=22>felixschwermut=40g=
mail.com</a>&gt; wrote:<br><br></div><blockquote type=3D=22cite=22><div>T=
hese are know bugs<div>
<br></div><div><ol><li>When you request a limit of X posts, the API may n=
ot return exactly X posts.<br><br>I think this has to do with posts that =
have been deleted / marked private on a blog. The API =22skips=22 over th=
em, but instead of filling in the missing posts with more posts, it just =
returns some number &lt;=3D X.<br>

<br>As such, you should *never* use the number of posts returned from the=
 .../blog/&lt;host&gt;/posts &nbsp;call when you set the Offset parameter=
 to fetch more.<br><br>Eg,<br>Suppose you fetch offset=3D0, limit=3D10 &n=
bsp;and you get 7 posts back.&nbsp;<br>

On your next call to fetch more posts, you *still use* offset=3D10, limit=
=3D10 &nbsp;and NOT &nbsp;offset=3D7, limit=3D10<br><br><br></li><li>The =
=22total posts=22 number you refer to is *Not* the number of posts *retur=
ned* by the call to .../blog/&lt;host&gt;/posts<br>

<br>It is meant to be the =22total number of posts on this blog=22<br><br=
>However, <b>*note*</b>&nbsp;there is another known bug here=21 &nbsp;The=
 number returned for =22Total Posts=22 is often incorrect=21<br><br>So do=
 not depend on this number when you are paginating through posts, to dete=
rmine if you reached the end=21</li>

</ol><div><br></div></div><div>=46elix</div><div><br></div><div><br><br><=
div>On Mon, Jul 9, 2012 at 11:17 AM, Walid Wannous <span dir=3D=22ltr=22>=
&lt;<a href=3D=22mailto:wwannous=40koein.com=22 target=3D=22=5Fblank=22>w=
wannous=40koein.com</a>&gt;</span> wrote:<br><blockquote type=3D=22cite=22=
><div>
Calling&nbsp;<a href=3D=22http://api.tumblr.com/v2/blog/toucheydesign.tum=
blr.com/posts=3Fapi=5Fkey=3D9ETjA----------------------------------------=
--JtQewBme=46IM&amp;tag=3Dphotography&amp;offset=3D1&amp;limit=3D10=22 ta=
rget=3D=22=5Fblank=22>http://api.tumblr.com/v2/blog/toucheydesign.tumblr.=
com/posts=3Fapi=5Fkey=3D9ETjA------------------------------------------Jt=
QewBme=46IM&amp;tag=3Dphotography&amp;offset=3D1&amp;limit=3D10</a>&nbsp;=
<div>


returns only 7 posts in the json although i have specified a limit of 10 =
and the total posts is 49 as mentioned in the json file.</div></div></blo=
ckquote></div><br><br clear=3D=22all=22><div><br></div>-- <br><div>=46eli=
x Bonkoski</div>


<br>
</div>
</div></blockquote></div></div></span>
                =20
                =20
                =20
                =20
                </blockquote>
                =20
                <div>
                    <br>
                </div>
            
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