Migration from v2 to v3

If you use builtin templates without modification, just regenerate them and use pgen as usual.

For those using modified templates or their own templates, below are some steps to migrate from v2 to v3:

You should add .array method call to loops.

v2:

{% for column in table.columns -%}

{% endfor %}

v3:

{% for column in table.columns.array -%}

{% endfor %}

v2:

{{ relation.sourceConstraint.columns[0].name }}

v3:

{{ relation.sourceConstraint.columns.array[0].name }}

Change column#foreignKeyConstraint to column#foreignKeyConstraints.array

In database, same column may be part of more than one foreign key constraints. Because of this foreignKeyConstraint is changed to foreignKeyConstraints in pg-structure module. As a consequence you should change your templates like example below:

v2:

{{ column.foreignKeyConstraint }}

v3:

{{ column.foreignKeyConstraints.array[0] }}

Change column#referencedColumn to column#referencedColumns.array

Same reason above.

v2:

{{ column.referencedColumn }}

v3:

{{ column.referencedColumns.array[0] }}