Google AppEngine复杂的WHERE条件

Question

我希望有类似

的条件

• start_time＆lt; = start_time_input＆lt; = end_time
• 或
• start_time＆lt; = end_time_input＆lt; = end_time
• 或
• （start_time_input＆lt; = start_time AND end_time＆lt; = end_time_input）

我理解的文档（http://code.google.com/appengine/docs/python/datastore/queries.html和http://code.google.com/appengine/docs/python/datastore/gqlqueryclass.html)as中确定的两种方式是：

filter_trips = db.GqlQuery（“SELECT key FROM Trips WHERE（start_time＆lt; =：start_time_input AND end_time＆gt; =：start_time_input）OR（start_time＆lt; =：end_time_input AND end_time＆gt; = ：end_time_input）OR（start_time＆gt; =：start_time_input AND end_time＆lt; = end_time_input）“，start_time_input = start_time_input，end_time_input = end_time_input）

错误：解析错误：符号处的WHERE标识符无效（

OR

filter_trips = db.GqlQuery（“SELECT key FROM Trips WHERE start_time＆lt; =：start_time_input＆lt; = end_time OR start_time＆lt; =：end_time_input＆lt; = end_time OR（：start_time_input＆lt; = start_time AND end_time＆lt; =：end_time_input）“，start_time_input = start_time_input，end_time_input = end_time_input）

错误：解析错误：在符号＆lt; =

处预计没有其他符号

请帮忙！

Answer 1

GQL没有OR。见http://code.google.com/appengine/docs/python/datastore/gqlreference.html

您需要以多个查询的方式执行此操作。