Django about Different templates have different results - django

Question

I'm a super newbie, so please refer to this and read it.
I am creating a bulletin board that communicates by DB <> API <> WEB method.
Successfully import comments with comment.html.
However, comments cannot be imported at {%inlude%} in boardapi_detail.html.
Please refer to the picture at the bottom of the article.
view.py
class Commentapi_list(generic.TemplateView):
def get(self, request, *args, **kwargs):
data = {
'pk': self.kwargs['pk'],
}
url = 'http://127.0.0.1:8080/boardapi/' + str(data['pk']) + '/comment/'
datas = requests.get(url, params=data).json()
# print(datas)
# print(type(datas))
df = pd.DataFrame(datas)
clist = [tuple(r) for r in df.to_numpy()]
print(clist)
# print(type(clist))
return render(self.request, 'comment_form.html', {
'comment_list' : clist
})
urls.py
path('board/<int:pk>/', views.Boardapi_detail.as_view(), name="board_detail")
comment.html
{% if not comment_list %}
<p class="text-center"> There is no comment. </p>
{% endif %}
<div style="margin:20px 0;">
{% for i in comment_list %}
<table width="100%" cellpadding="0" cellspacing="0" class="tbl_replist" id="reply_list_layer">
<tbody>
<tr style="height:45px;border-top:solid 1px #dddddd;">
<td style="padding-left: 10px;border-top: 1px solid #eee;width: 114px;">{{ i.1 }}</td>
<td style="vertical-align: top;border-top: 1px solid #eee;padding: 10px 0;">{{ i.2 }}
<span style="color: #999;font-size: 11px;display: block;">{{ i.3 }}</span>
</td>
</tr>
{% if user.username == i.c_writer or user.is_staff %}
delete
{% endif %}
</tbody>
</table>
{% endfor %}
</div>
boardapi_detail.html
{% if not board_detail %}
<p class="text-center">There's nothing. </p>
{% else %}
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr style="height:45px;border-top:solid 1px #dddddd;">
<td width="20%" align="center">title</td>
<td width="80%" align="left">{{ board_detail.b_title }} </td>
</tr>
<tr style="height:45px;border-top:solid 1px #dddddd;">
<td width="20%" align="center">writer</td>
<td width="80%" align="left">{{ board_detail.b_writer }} </td>
</tr>
<tr style="height:45px;border-top:solid 1px #dddddd;">
<td width="20%" align="center">note</td>
<td width="80%" align="left">{{ board_detail.b_note }}</td>
</tr>
<tr style="height:45px;border-top:solid 1px #dddddd;">
<td width="20%" align="center">time</td>
<td width="80%" align="left">{{ board_detail.b_date }} </td>
</tr>
<tr style="height:60px;border-top:solid 1px #dddddd;" align="center">
<td width="100%" colspan="2">
edit
<button class="btn btn-outline-success my-2 my-sm-0" style="margin-right:10px;" onclick="location.href='/board/'">list</button>
</td>
</tr>
<tr style="height:45px;border-top:solid 1px #dddddd;">
<td width="20%" align="center">comment</td>
<td width="80%" align="left">({{ board.comment_set.all.count }})</td>
</tr>
</table>
{% endif %}
{% include "comment.html" %}
The pictures below are about the first article each.
comment.html page
↑Successfully imported all 3 comments.
boardapi_detail.html page
↑couldn't get even one comment.