Germano questions

Germano answers

• what's a good/structured way to prevent memcached CacheKeyWarning's?
• Django Query: How to use sql "union" and "not in" function
• Django Generic Foreign Key Filtering (difference between v1.5 & v1.6)
• django signals: receiver and proxy model?
• Django locking between clean() and save()
• Searching by related fields in django admin
• Fastest way to convert a dict's keys & values from `unicode` to `str`?
• JSON Schema: Validate that exactly one property is present