Clear errors before validating models

[spicybackend]

Allow successive and independent calls to check model validity.

Currently validation checking is not independent and errors are left over from previous checks.

model.name = ""
model.valid? # => false, fails on validation for presence
name.name = "name"
model.valid? # => false, fails because errors are left over from previous validation

After this change validation checks clear previous errors before running the associated validators to add errors back onto the model.

model.name = ""
model.valid? # => false, fails on validation for presence
name.name = "name"
model.valid? # => true

This is not particularly useful for production code, but allows for more flexibility in specs.

[robacarp]

thanks @yumoose ! I like it

[drujensen]

💯