uint32 and similar fields are always marshaled into BSON int64

[xen0n]

• There can be nil maps that break reflect-based setters like mergo Automatically fills Go default values #117
• It seems uint32 is unconditionally marshaled into NumberLong, it breaks one of our in-house data extraction scripts. fix uint32 encode. mongodb/mongo-go-driver#193 (closed by upstream but has a workaround)

[xen0n]

N.B. These are actually mongo-driver bugs/features, but have caused actual pain in our transition away from mgo. I don't know if such shimming should be best done in qmgo proper.

[xen0n]

First one is dup of #117, updated parent comment.

[jiangz222]

Record here
Wait for official plan.

[xen0n]

For the time being, you can mass-update (or insert) bson:"foo" tags to look like bson:"foo,minsize", for the affected fields, to maintain compatibility of stored data.

[lifegit]

excuse me, can you tell me how to use it?
#117