oshipka/vm_gen/templates/html/_create.html

<form action="{{ url_for('create_[[ name|camel_to_snake ]]') }}" method="post">
    <input type="hidden" name="_next" value="{{ url_for('list_[[ name|camel_to_snake ]]') }}"/>
    [%- for column in columns %]
      <label for="input-[[ name|camel_to_snake ]]-[[ column.name ]]">[[ column.name ]]</label>:
      [%- if column.type in ['relationship'] %]
        <select id="input-[[ name|camel_to_snake ]]-[[ column.name ]]"
               name="[[ column.name ]]_id">
            <option selected="selected">Choose...</option>
                {%- for sub_instance in model_views.[[ column.name ]].model.query.all() %}
            <option value="{{ sub_instance.id }}">{{ sub_instance.name }}</option>
                {%- endfor %}
        </select>
      [%- else %]
        <input id="input-[[ name|camel_to_snake ]]-[[ column.name ]]"
               type="text" name="[[ column.name ]]" autocomplete="off"
        />
      [%- endif %]
    [%- endfor %]
    <input type="submit">
</form>