Module controller 

Enforcing a schema against a write, and growing it implicitly.

Upstream splits this across enforceFieldExists, validateObject and validateRequiredColumns (SchemaController.js). The part that matters for 0.1.0 is the pair of decisions made per field on every write: does this field already have a type, and does the incoming value agree with it.

Structs

SchemaDelta

What a write implies for the schema.

Functions

apply

Apply a delta. Separate from validate_write so the caller controls when it happens.

default_schema

The schema a brand new class starts with: the four default columns and nothing else.

validate_write

Validate a write against a class schema and report what it would add.

value_matches

Does a value belong in a field of this type?