DJ matlab complains about datatypes only supported by DJ python

[shenshan]

I have a table in schema that contains a field with data type attach. When I run a package in matlab inserting entries into another table in that schema, DJ matlab complains about this datatype:

Error using dj.internal.Declare.matchType (line 394)
UnsupportedType: Attribute type 'attach' is not a valid type.

Error in dj.internal.Header.initFromDatabase (line 97)
                    category = dj.internal.Declare.matchType(attrs.type{i});

Error in dj.Schema/reload (line 209)
                    self.headers(info.name) = dj.internal.Header.initFromDatabase(self,info);

Error in dj.Schema/get.tableNames (line 174)
            self.reload(false)

Error in dj.Schema/get.classNames (line 76)
            names =  self.tableNames.keys;

Error in dj.internal.TableAccessor (line 25)
            for className = schema.classNames

Error in dj.Schema (line 69)
            self.v = dj.internal.TableAccessor(self);

Error in test.getSchema (line 4)
    schemaObject = dj.Schema(dj.conn, 'test', 'test');

Error in dj.internal.Table/get.schema (line 101)
                self.schema = feval(schemaFunction);

Error in dj.internal.Table/get.tableHeader (line 83)
                self.tableHeader = self.schema.headers(self.plainTableName);

Error in dj.internal.GeneralRelvar/compile (line 672)
                    header = derive(tab.tableHeader);

Error in dj.internal.GeneralRelvar/get.header (line 43)
            header = self.compile;

Error in dj.Relvar/insert (line 304)
            header = self.header;

Error in insert_tuples (line 9)
    insert(test.Insert, key_tech)

This bug is seen in the branch shan-crash-20200529, I haven't tested it for major external storage branch. Will do a more thorough testing later on. Not quite urgent for the moment.

[shenshan]

Here is a detailed instruction on how to reproduce the bug:

In DJ python, define the following schema and table:

import datajoint as dj
schema = dj.schema('test')

@schema
class Attach(dj.Manual):
    definition = """
    ref_pk  : tinyint
    ---
    file    : attach
    """

and declare it.

In matlab, create the package to talk to that schema test in the current directory

dj.createSchema('test', '.', 'test')

If we try to get the schema of package +test, by

schema = test.getSchema()

We got the error:

Error using dj.internal.Declare.matchType (line 394)
UnsupportedType: Attribute type 'attach' is not a valid type.

Error in dj.internal.Header.initFromDatabase (line 97)
                    category = dj.internal.Declare.matchType(attrs.type{i});

Error in dj.Schema/reload (line 209)
                    self.headers(info.name) = dj.internal.Header.initFromDatabase(self,info);

Error in dj.Schema/get.tableNames (line 174)
            self.reload(false)

Error in dj.Schema/get.classNames (line 76)
            names =  self.tableNames.keys;

Error in dj.internal.TableAccessor (line 25)
            for className = schema.classNames

Error in dj.Schema (line 69)
            self.v = dj.internal.TableAccessor(self);

Error in test.getSchema (line 4)
    schemaObject = dj.Schema(dj.conn, 'test', 'test');

Exact same thing happened when I created a random table with a filepath@storage field in DJ python.