Relation between tables in different schemas with big names

[felipeps]

I'm using Django 1.9.7 with Postgresql.

When I try to migrate a relation between two tables in different schemas, for example: a table named product, which is in a schema named dataflex and another table named client_product_sale_stc in another schema.

I got this error:

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django.db.utils.ProgrammingError: ERRO: syntax error at or near "dataflex"
LINE 1: ...CONSTRAINT "client_product_setor_id_52aad07a_fk_"dataflex"....

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After sometime trying to figure It out a solution for this problem, I tried to change the schemas's name to just df instead of dataflex and It worked perfectly.

I also tried to decreased table's name size and It worked just like when I decreased schema's name size, so It seems to be a problem with big constraints names.

I'm using the following syntax:

db_table = '"dataflex"."product"'

setor_id is the name of the field of the relation in client_product_sale_stx model/table.
product model/table does not have a field for the relation.