Symfony 3.0 support

[olix21]

It could be great to support the third version of the symfony framework!

[zgoniaiko]

👍

[AliHichem]

As you can see from the TravisCi output https://travis-ci.org/AliHichem/AliDatatableBundle/builds/101401355, I'm getting some errors with both php5.6 and php7 having sf3 installed, I'm not sure whether this is a dependency issue or an incompatibility one. Did any of you guys already work with sf3 ? Have encounter any issue with this bundle on sf3 ?

I personally still work with sf2.8 as I have big projects going on , I tried to make the upgrade to sf3 starting by removing all the deprecation and so but I had no luck (and it was not fun too lol).. Yet again I plan on upgrading to sf3 soon on my daily work so I'll take care of the support of this bundle to sf3 and you'll get notified about it once I start with the v3 which will basically have full support of sf3 (php7 probably) and hopefully a mongodb driver. I'm leaving this issue open anyway.

[cwhartl]

when are you going to fix this issue?

[cwhartl]

I added sf3-support in #172