fix: Download template error

[shaohuzhang1]

fix: Download template error --bug=1051908 --user=王孝刚 【知识库】导出的文档打开后里面为错误日志，无文档内容，导出的压缩包不能解压 https://www.tapd.cn/57709429/s/1650087

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[shaohuzhang1]

1. The code is already formatted well and there are no significant stylistic issues.
2. There are two instances where get_language() is called but not used directly in a translation string (_('MaxKB table template.csv') or 'table_template_{}{}'.format(to_locale(language), '.xlsx')). This can be refactored to use the locale-specific path directly if needed.
3. No functional issues were identified.

Overall, the code appears to follow Python best practices and standard conventions.

[shaohuzhang1]

There are several improvements and corrections needed in the provided code:

1. Imports: The gettext function from django.utils.translation should not be imported again because it has already been imported at the top.

2. String Formatting: In Django templates, you don't need to use _() (gettext_lazy) or gettext for strings that aren't translations. Use them only where they are intended as actual internationalized words or phrases.

Here is a corrected version of the code:

from django.db.models import QuerySet, Count
from django.db.models.functions import Substr, Reverse
from django.http import HttpResponse
+import os
from drf_yasg import openapi
from openpyxl.cell.cell import ILLEGAL_CHARACTERS_RE
from rest_framework import serializers

def get_request_params_api():
    ...  # Existing code remains unchanged

class ExportSerializer(serializers.Serializer):
    type = serializers.CharField()

    def export(self, with_valid=True):
        if with_valid:
            self.is_valid(raise_exception=True)

        PROJECT_DIR = os.path.dirname(os.path.abspath(__file__))

        if self.data.get('type') == 'csv':
            file_path = os.path.join(PROJECT_DIR, "apps", "dataset", 'template', f'csv_template_{to_locale(get_language())}.csv')
            print(f"File path: {file_path}")
            with open(file_path, "rb") as file:
                content = file.read()
            return HttpResponse(content, status=200, headers={
                'Content-Type': 'text/csv',
                'Content-Disposition': f'attachment; filename="csv_template.csv"'
            })
        elif self.data.get('type') == 'excel':
            file_path = os.path.join(PROJECT_DIR, "apps", "dataset", 'template', f'excel_template_{to_locale(get_language())}.xlsx')
            print(f"File path: {file_path}")
            with open(file_path, "rb") as file:
                content = file.read()
            return HttpResponse(content, status=200, headers={
                'Content-Type': 'application/vnd.ms-excel',
                'Content-Disposition': f'attachment; filename="excel_template.xlsx"'
            })

    def table_export(self, with_valid=True):
        if with_valid:
            self.is_valid(raise_exception=True)

        PROJECT_DIR = os.path.dirname(os.path.abspath(__file__))
        language = get_language()

        if self.data.get('type') == 'csv':
            file_path =os.path.join(PROJECT_DIR, "apps", "dataset", 'template', f'table_template_{to_locale(get_current_language())}.csv')
            print(f"Table File path: {file_path}")
            with open(file_path, "rb") as file:
                content = file.read()
            return HttpResponse(content, status=200, headers={
                'Content-Type': 'text/csv',
                'Content-Disposition': f'attachment; filename="table_template.csv"'
            })
        elif self.data.get('type') == 'excel':
            file_path = os.path.join(PROJECT_DIR, "apps", "dataset", 'template', f'table_template_{to_locale(get_current_language())}.xlsx')
            print(f"Excel Table File path: {file_path}")
            with open(file_path, "rb") as file:
                content = file.read()
            return HttpResponse(content, status=200, headers={
                'Content-Type': 'application/vnd.ms-excel',
                'Content-Disposition': f'attachment; filename="table_template.xlsx"'
            })

Key Corrections:

• Removed duplicate imports (gettext).
• Used os.path.join for better cross-platform compatibility.
• Corrected syntax errors like missing closing parentheses and brackets.
• Replaced print statements for debugging purposes.
• Fixed string paths to include locale-specific files by using get_current_language() instead of an empty argument after _() in some places.