form macro for jinja2 on django

{%- macro form_field_label(field, label_width) -%}
    <label for="id_{{field.name}}" class="col-sm-{{label_width}} control-label">{{field.label}}:{%- if field.field.required -%}
    &nbsp;<abbr title="この項目は必須です" class="label label-warning">必須</abbr>
    {%- endif %}</label>
{% endmacro %}

{%- macro form_field_description(field) -%}
    {% if field.help_text %}
<span class="help-block">{{ field.help_text }}</span>
    {% endif %}
{%- endmacro -%}

{%- macro form_field_errors(field) -%}
    {% if field.errors %}
    <div style="margin-bottom:15px;margin-top:10px">
        {%- for error in field.errors -%}
<div>
        <span class="label label-danger"><i class="icon-exclamation-sign icon-white"></i> {{ error|safe }}</span>
</div>
        {%- endfor -%}
    </div>
    {% endif %}
{%- endmacro -%}

{%- macro form_field_file(field) -%}
<div class="fileupload fileupload-new" data-provides="fileupload">
  <div class="input-append">
    <div class="uneditable-input span3"><i class="icon-file fileupload-exists"></i> <span class="fileupload-preview"></span></div><span class="btn btn-file"><span class="fileupload-new">ファイルを選択</span><span class="fileupload-exists">変更</span><input type="file" name="{{field.name}}" /></span><a href="#" class="btn fileupload-exists" data-dismiss="fileupload">選択解除</a>
  </div>
</div>
{%- endmacro -%}


{%- macro action_buttons(label_width, input_width, submit_title="作成", cancel_title="キャンセル", submit_class="btn-primary") -%}
<div class="form-group">
    <div class="col-sm-offset-{{label_width}} col-sm-{{input_width}}">
      <input type="submit" class="btn btn-lg {{submit_class}}" value="{{submit_title}}" />
    </div>
    &nbsp;
    <button type="reset" class="btn">{{cancel_title}}</button>
</div>
{%- endmacro -%}

{%- macro form_field(field, label_width, input_width) -%}
<div class="form-group{% if field.errors %} has-error{% endif %}">
    {% if field.is_hidden %}
        {{ field() }}
    {% else %}
        {{ form_field_label(field, label_width) }}
        <div class="col-sm-{{input_width}}">
          {% if field.field.widget.__class__.__name__ == 'Textarea' %}
              {{ field|addattr({'class':'form-control', 'row':5}) }}
          {% elif field.field.widget.__class__.__name__ == 'Radio' %}
              {{ field() }}
          {% elif field.field.widget.__class__.__name__ == 'File' %}
              {{ form_field_file(field) }}
          {% else %}
              {{ field|addattr({'class':'form-control'})|safe }}
          {% endif %}
          {{ form_field_errors(field) }}
          {{ form_field_description(field) }}
        </div>
    {% endif %}
</div>
{%- endmacro -%}

{%- macro form_fields(fields, class=None, legend=None) -%}
  <fieldset {% if class %}class="{{class}}"{% endif %}>
    {% if legend %}
      <legend>{{legend}}</legend>
    {% endif %}
    {% for field in fields %}
        {% if field.type == 'HiddenField' %}
            {{ field() }}
        {% else %}
            {{ form_field(field) }}
        {% endif %}
    {% endfor %}
  </fieldset>
{%- endmacro -%}

{# How to use #}

{% from "macro/form.jinja" import form_field %}
<form method="post" action="/form/create" class="form-horizontal" role="form">
    {% csrf_token %}
    {% for field in form %}
        {{form_field(field, 2, 10)}}
    {% endfor %}
    {% from "macro/form.jinja" import action_buttons %}
    {% if action=='create' %}
      {{action_buttons(2, 10, 'Create')}}
    {% else %}
      {{action_buttons(2, 10, 'Save')}}
    {% endif %}
</form>
{% endblock %}