def manage_topic(**kwargs):
"""用户对话题的管理"""
message = {"message": "success"}
try:
the_type = kwargs.pop("the_type")
if the_type == "add":
"""添加"""
if kwargs['begin_date'] == "":
kwargs['begin_date'] = my_db.current_datetime()
if kwargs['end_date'] == "":
kwargs['end_date'] = my_db.current_datetime(365)
kwargs['can_show'] = 0
sql = my_db.structure_sql("add", "topic_info", **kwargs)
sql_session = my_db.sql_session()
print(sql)
sql_session.execute(sql)
sql_session.commit()
sql_session.close()
elif the_type == "edit":
pass
except KeyError:
message['message'] = "不理解的操作"
except Exception as e:
message['message'] = "数据库执行错误"
print(e)
finally:
return message
def vote(**kwargs):
"""投票计数"""
message = {"message": "success"}
kwargs['create_date'] = my_db.current_datetime()
sql = my_db.structure_sql("add", "vote_count", **kwargs)
sql_session = my_db.sql_session()
try:
sql_session.execute(sql)
sql_session.commit()
"""同步道缓存"""
lock = RLock()
lock.acquire()
add_vote_cache(kwargs['topic_id'], kwargs['support_a'],
kwargs['support_b'])
lock.release()
except sqlalchemy.exc.IntegrityError as e1:
"""
re.findall(r"for key '(.+?)'",str) 是从str中找到匹配以for key 'PRIMARY'")
句子中的PRIMARY,findall方法返回的是数组
"""
print(e1.args)
error_cause = re.findall(r"for key '(.+?)'", e1.args[-1])[0]
if error_cause == "only_once":
message["message"] = "你已经投过票了"
else:
print(error_cause)
message['message'] = "投票失败，请联系管理员"
finally:
sql_session.close()
return message
def up_down(**kwargs):
"""赞和踩"""
message = {"message": "success"}
up_down_str = kwargs.get("up_down_str")
if up_down_str is None:
message['message'] = 'error'
else:
kwargs.pop("up_down_str")
if up_down_str == "up":
kwargs['up_it'] = 1
kwargs['down_it'] = 0
else:
kwargs['up_it'] = 0
kwargs['down_it'] = 1
kwargs['create_date'] = my_db.current_datetime()
ses = my_db.sql_session()
comment_id = kwargs['comment_id']
only_id= kwargs['only_id']
sql = "delete from up_down_info where comment_id={} and only_id='{}'".format(comment_id, only_id)
ses.execute(sql)
ses.commit()
sql = my_db.structure_sql("add", "up_down_info", **kwargs)
ses.execute(sql)
ses.commit()
ses.close()
return message
def index_topic_list():
"""获取首页的各频道的话题列表，返回的是是字典
字典以channel_id为ｋｅｙ，值是话题字典的数组，排序以优先级＋发布时间来排序
这里不包含置顶帖子，置顶帖子会在视图函数中与此结果重新组合。
"""
cache = my_db.cache
key = "index_topic_dict"
index_topic_dict = cache.get(key)
if index_topic_dict is None:
"""从数据库查询"""
channel_id_list = [x['channel_id'] for x in channel_list()]
current_date = my_db.current_datetime()
index_topic_dict = dict() # 结果集容器
columns_str = "channel_id,class_id,top_id,top_title"
columns = columns_str.split(",")
columns.append('view_count')
ses = my_db.sql_session()
for channel_id in channel_id_list:
"""首页查询的结果将不会排除过期的话题／投票"""
sql = "select {0},(select count(view_count.view_id) from view_count where " \
"topic_info.top_id=view_count.topic_id) from topic_info where can_show=1 " \
"and channel_id={1} " \
"order by create_date desc limit 0,5".format(columns_str, channel_id)
proxy = ses.execute(sql)
temp = proxy.fetchall()
result = [dict(zip(columns, x)) for x in temp]
index_topic_dict[channel_id] = result
ses.close()
"""将字典按照左右两列排序，以帖子被浏览总数降序排列"""
pass
cache.set(key, index_topic_dict, timeout=60 * 1)
return index_topic_dict
def add(user_id, detail):
"""对某个用户添加一个新的消息通知。
当遇到评论过千、审核通过时，调用此方法将消息写入数据库。
detail为通知的详细内容。"""
session = my_db.sql_session()
sql = "insert into zvoter.notification (`user_id`, `detail`, `read`, `date`) values ('{}', '{}', {}, '{}')".\
format(user_id, detail, 0, my_db.current_datetime())
session.execute(sql)
session.commit()
def __add_view_count(topic_id, only_id, from_ip, browser_type):
"""低级方法。对页面浏览进行计数"""
message = {'message': "success"}
sql = "insert into view_count(topic_id,only_id,from_ip,browser_type,create_date) " \
"values('{0}','{1}','{2}','{3}','{4}')".format(topic_id, only_id, from_ip,
browser_type, my_db.current_datetime())
ses = my_db.sql_session()
ses.execute(sql)
ses.commit()
ses.close()
return message
def manage_comment(**kwargs):
"""管理用户留言"""
message = {"message": "success"}
ses = my_db.sql_session()
try:
the_type = kwargs.pop("the_type")
if the_type == "add":
"""添加留言"""
kwargs['create_date'] = my_db.current_datetime()
sql = my_db.structure_sql("add", "comment_info", **kwargs)
ses.execute(sql)
ses.commit()
elif the_type == "edit":
comment_id = kwargs.pop("comment_id")
sql = my_db.structure_sql("edit", "comment_info",
"where comment_id={}".format(comment_id),
**kwargs)
ses.execute(sql)
ses.commit()
elif the_type == 'delete':
comment_id = kwargs.pop("comment_id")
sql = my_db.structure_sql("delete", "comment_info",
"where comment_id={}".format(comment_id),
**kwargs)
ses.execute(sql)
ses.commit()
elif the_type == "by_comment_id":
"""根据评论id获取话题"""
comment_id = kwargs.pop("comment_id")
child_sql = "(SELECT CONCAT_WS(' vs ',SUM(up_it),SUM(down)) " \
"FROM up_down_info WHERE up_down_info.comment_id=comment_info.comment_id)" # 查询赞和踩的子查询
column_str = "comment_id,comment_text,comment_author,user_info.user_nickname,user_info.user_img_url," \
"create_date,support_side,topic_id,parent_comment,comment_status,{}".format(child_sql)
sql = "select {} from comment_info,user_info where comment_status>0 user_id=comment_author " \
"and comment_id={}".format(column_str, comment_id)
proxy = ses.execute(sql)
result = proxy.fetchone()
columns = [
'comment_id', 'comment_text', 'user_id', 'user_nickname',
'user_img_url', 'create_date', 'support_side', 'topic_id',
'parent_comment', 'comment_status', "up_vs_down"
]
"""
列名分别代表：评论id，评论内容,用户id，用户昵称，用户头像，发布时间，支持方向，话题id，评论状态
被评论对象id，赞和踩的数量
"""
if result is None:
message['data'] = dict()
else:
message['data'] = dict(zip(columns, result))
elif the_type == "by_topic_id":
"""根据话题id获取话题"""
topic_id = kwargs.pop("topic_id")
child_sql = "(SELECT CONCAT_WS(' vs ',SUM(up_it),SUM(down_it)) " \
"FROM up_down_info WHERE up_down_info.comment_id=comment_info.comment_id)" # 查询赞和踩的子查询
column_str = "comment_id,comment_text,comment_author,user_info.user_nickname,user_info.user_img_url," \
"comment_info.create_date,support_side,topic_id,parent_comment,comment_status,{}".\
format(child_sql)
sql = "select {} from comment_info,user_info where comment_status>0 and user_id=comment_author " \
"and topic_id={}".format(column_str, topic_id)
proxy = ses.execute(sql)
result = proxy.fetchall()
columns = [
'comment_id', 'comment_text', 'user_id', 'user_nickname',
'user_img_url', 'create_date', 'support_side', 'topic_id',
'parent_comment', 'comment_status', "up_vs_down"
]
"""
列名分别代表：评论id，评论内容,用户id，用户昵称，用户头像，发布时间，支持方向，话题id，评论状态
被评论对象id，赞和踩的数量
"""
if len(result) == 0:
message['data'] = list()
else:
result = [dict(zip(columns, x)) for x in result]
message['data'] = result
elif the_type == "all":
"""获取所有评论，用于后台管理"""
topic_id = kwargs.pop("topic_id")
child_sql = "(SELECT CONCAT_WS(' vs ',SUM(up_it),SUM(down)) " \
"FROM up_down_info WHERE up_down_info.comment_id=comment_info.comment_id)" # 查询赞和踩的子查询
column_str = "comment_id,comment_text,comment_author,user_info.user_nickname,user_info.user_img_url," \
"create_date,support_side,topic_id,parent_comment,comment_status,{}".format(child_sql)
sql = "select {} from comment_info,user_info where user_id=comment_author " \
"and topic_id={}".format(column_str, topic_id)
proxy = ses.execute(sql)
result = proxy.fetchall()
columns = [
'comment_id', 'comment_text', 'user_id', 'user_nickname',
'user_img_url', 'create_date', 'support_side', 'topic_id',
'parent_comment', 'comment_status', "up_vs_down"
]
"""
列名分别代表：评论id，评论内容,用户id，用户昵称，用户头像，发布时间，支持方向，话题id，评论状态
被评论对象id，赞和踩的数量
"""
if len(result) == 0:
message['data'] = list()
else:
message['data'] = [dict(zip(columns, x)) for x in result]
elif the_type == "page":
"""分页查询所有评论"""
index = kwargs.get("index")
length = kwargs.get("page_length")
try:
index = int(index)
length = int(length)
columns = [
'comment_id', 'comment_text', 'comment_author',
'comment_info.create_date', 'support_side',
'user_info.user_nickname', 'topic_id',
'topic_info.top_title', 'parent_comment', 'comment_status'
]
sql = "select " + ",".join(columns) + (
" from comment_info,user_info,topic_info where "
"topic_info.top_id=comment_info.topic_id and "
"user_id=comment_author order by create_date desc "
"limit {},{}".format((index - 1) * length, length))
try:
columns = [
'comment_id', 'comment_text', 'comment_author',
'create_date', 'support_side', 'user_nickname',
'topic_id', 'topic_title', 'parent_comment',
'comment_status'
]
proxy_result = ses.execute(sql)
result = proxy_result.fetchall()
if len(result) != 0:
result = [my_db.str_format(x) for x in result]
data = [dict(zip(columns, x)) for x in result]
else:
data = []
message['data'] = data
except Exception as e:
print(e)
message['message'] = "查询错误"
except ValueError:
message['message'] = "无效的页码或者步长"
except KeyError:
message['message'] = "不理解的操作"
except Exception as e:
print(e)
message['message'] = "数据库执行错误"
finally:
ses.close()
return message
def manage_topic_admin(**kwargs):
"""后台对话题的管理"""
message = {"message": "success"}
sql_session = my_db.sql_session()
try:
the_type = kwargs.pop("the_type")
if the_type == "add":
"""添加"""
if kwargs['begin_date'] == "":
kwargs['begin_date'] = my_db.current_datetime()
if kwargs['end_date'] == "":
kwargs.pop('end_date')
kwargs['can_show'] = 0
sql = my_db.structure_sql("add", "topic_info", **kwargs)
print(sql)
sql_session.execute(sql)
sql_session.commit()
elif the_type == "edit":
"""编辑"""
try:
top_id = kwargs.pop("top_id")
if kwargs['begin_date'] == "":
kwargs['begin_date'] = my_db.current_datetime()
if kwargs['end_date'] == "":
kwargs['end_date'] = my_db.current_datetime(365)
sql = my_db.structure_sql("edit", "topic_info",
"where top_id='{}'".format(top_id),
**kwargs)
sql_session.execute(sql)
sql_session.commit()
except KeyError:
message['message'] == '错误的话题id'
except Exception as e:
message['message'] = "数据库执行错误"
print(e)
elif the_type == "drop":
"""删除"""
try:
top_id = kwargs.pop("top_id")
sql = "delete from topic_info where top_id={}".format(top_id)
sql_session.execute(sql)
sql_session.commit()
except KeyError:
message['message'] == '错误的话题id'
except Exception as e:
message['message'] = "数据库执行错误"
print(e)
elif the_type == "status":
"""话题状态的调整，审核/拒绝/置顶等"""
try:
top_id = kwargs.pop("top_id")
topic_status = kwargs.pop("topic_status")
sql = "update topic_info set can_show={} where top_id={}".format(
topic_status, top_id)
sql_session.execute(sql)
sql_session.commit()
except KeyError:
message['message'] = '错误的话题id'
except Exception as e:
print(e)
message['message'] = "数据库执行错误"
elif the_type == "single":
"""根据id获取单个话题的内容"""
top_id = kwargs.pop("top_id")
child_sql = "(SELECT CONCAT_WS(' vs ',SUM(support_a),SUM(support_b)) " \
"FROM vote_count WHERE vote_count.topic_id=topic_info.top_id)" # 查询ab支持度的子查询
sql = "SELECT top_id,top_title,top_content,viewpoint_a,viewpoint_b,can_show,img_url_a,img_url_b," \
"topic_info.channel_id,channel_info.channel_name,topic_info.class_id," \
"class_info.class_name,end_date,begin_date," \
"user_info.user_nickname,{} FROM topic_info,channel_info,class_info,user_info " \
"WHERE user_info.user_id=topic_info.author " \
"AND channel_info.channel_id=topic_info.channel_id and " \
"class_info.class_id=topic_info.class_id AND " \
"top_id='{}'".format(child_sql, top_id)
columns = [
'top_id', 'top_title', 'top_content', 'viewpoint_a',
'viewpoint_b', 'can_show', 'img_url_a', 'img_url_b',
'channel_id', 'channel_name', 'class_id', 'class_name',
'end_date', 'begin_date', 'author', "a_vs_b"
]
proxy_result = sql_session.execute(sql)
result = proxy_result.fetchone()
result = my_db.str_format(result)
sql_session.close()
data = dict(zip(columns, result))
message['data'] = data
elif the_type == "page":
"""分页查询话题"""
index = kwargs.get("index")
length = kwargs.get("page_length")
try:
index = int(index)
length = int(length)
columns = get_columns()
sql = "select " + ",".join(columns) + (
" from topic_info order by create_date desc "
"limit {},{}".format((index - 1) * length, length))
try:
proxy_result = sql_session.execute(sql)
result = proxy_result.fetchall()
if len(result) != 0:
result = [my_db.str_format(x) for x in result]
data = [dict(zip(columns, x)) for x in result]
else:
data = []
message['data'] = data
except Exception as e:
print(e)
message['message'] = "查询错误"
except ValueError:
message['message'] = "无效的页码或者步长"
except KeyError as e:
print(e)
message['message'] = "不理解的操作"
except Exception as e:
print(e)
message['message'] = "数据库执行错误"
finally:
sql_session.close()
return message