Add rules: different, uuid, distinct, required_if, required_with

[girardinsamuel]

• Add different rule (more handy than doing isnt(equals("field")))

{
  "first_name": "Sam",
  "last_name": "Gamji"
}
validate.different("first_name", "last_name")

• Add uuid rule

{
  "doc_id": "c1d38bb1-139e-4099-8a20-61a2a0c9b996"
}
validate.uuid("doc_id")
validate.uuid("doc_id", 4)
validate.uuid("doc_id", "4")
validate.uuid("doc_id", version=4)

• Edit required rule (check Inconsistency between exists and required validation rule #45)
• Add distinct rule

{
  "users": ["sam", "joe", "joe"]
}
validate.distinct("users"). # fail
{
  "users": [
       {
            "id": 1,
            "name": "joe"
       },
       {
            "id": 1,
            "name": "sam"
       },
  ]
}
validate.distinct("users.*.id"). # fail

• Add required_if rule

The field under validation must be present and not empty only
if an other field has a given value.

{
  "first_name": "Sam",
  "last_name": "Gamji"
}
validate.required_if("first_name", "last_name", "Gamji")

• Add required_with rule

The field under validation must be present and not empty only
if any of the other specified fields are present.

{
  "first_name": "Sam",
  "last_name": "Gamji",
  "email": "samgamji@lotr.com"
}
validate.required_with("email", ["first_name", "nick_name"])
validate.required_with("email", "first_name,nick_name")

[girardinsamuel]

@josephmancuso ready for review :) !

[josephmancuso]

Love it. Left some small requests

[girardinsamuel]

@josephmancuso I made the changes !

[girardinsamuel]

Should we merge it in 3.0 or 2.X ?

[josephmancuso]

All looks good to me :)