Django学习 - day13

日志大法，浅浅试了一下
首先就是在setting.py 中配置LOGGING

LOGGING = {
    "version": 1,
    "formatters": {
        "simple": {
            "format": '[%(levelname)s][%(asctime)s][%(filename)s:%(lineno)d]%(message)s'
        },
        "standard": {
            "format": '%(levelname)s:%(asctime)s:%(filename)s:%(lineno)d:%(message)s'
        }
    },
    "handlers": {
        "console": {
            "class": "logging.StreamHandler",
            "level": "DEBUG",
            "formatter": "simple"
        },
        "file": {
            "class": "logging.FileHandler",
            "formatter": "simple",
            "filename": "logtest.log"
        }
    },
    "loggers": {
        "simple": {
            "level": "DEBUG",
            "handlers": ["file"],
            "propagate": True
        },
        "standard": {
            "level": "ERROR",
            "handlers": ["console", "file"],
            "propagate": True
        }
    }
}

上面指定了创建的日志文件“logtest.log”，指定了日志级别‘simple’和‘standard’，
simple代表debug级别，只输出到日志文件。
standard 代表error级别，会输出到控制台和日志文件。

import logging
logger = logging.getLogger('standard')
def export_model_as_csv(modeladmin, request, queryset):
    response = HttpResponse(content_type='test/csv',
                            headers={'Content-Disposition': 'attachment; filename=test_%s.csv' % (
                                datetime.now().strftime('%Y-%m-%d-%H-%M-%S'),)
                                     })
    field_list = export_list
    write = csv.writer(response)
    write.writerow([
        queryset.model._meta.get_field(f).verbose_name.title() for f in field_list
    ])
    for obj in queryset:
        csv_line_values = []
        for field in field_list:
            field_object = queryset.model._meta.get_field(field)
            field_value = field_object.value_from_object(obj)
            csv_line_values.append(field_value)
        write.writerow(csv_line_values)
        #在这里哦
    logger.error("%s exported %s candidate records" % (request.user, len(queryset)))
    return response