如何解决错误:此服务需要项目ID,但无法确定 [英] How to fix error: A project ID is required for this service but could not be determined
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问题描述
我尝试从AppEngine向Google Datastore插入数据,并收到错误消息:
java.lang .IllegalArgumentException:此服务需要项目标识,但无法从构建器或环境中确定。请使用构建器设置项目ID。
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:92)
at com.google.cloud.ServiceOptions。< init>(ServiceOptions.java:324)
在com.google.cloud.datastore.DatastoreOptions。< init>(DatastoreOptions.java:85)
在com.google.cloud.datastore.DatastoreOptions。< init>(DatastoreOptions.java:32)
在com.google.cloud.datastore.DatastoreOptions $ Builder.build(DatastoreOptions.java:75)
在com.google.cloud.datastore.DatastoreOptions.defaultInstance(DatastoreOptions.java:123)
以下是我的代码:
Datastore datastore = DatastoreOptions.defaultInstance()。service();
KeyFactory keyFactory = datastore.newKeyFactory()。kind(keyKind);
Key key = keyFactory.newKey(keyName);
实体实体= Entity.builder(键)
.set(name,John Doe)
.set(age,30)
.set( access_time,DateTime.now())
.build();
datastore.put(entity);
如何解决此错误?
解决方案
您是否运行AE标准或 AE Flexible ?
请确保您的App Engine api jar 在你的类路径(WEB-INF / lib目录)中。
I'm trying to insert data to Google Datastore from AppEngine and I'm getting an error:
java.lang.IllegalArgumentException: A project ID is required for this service but could not be determined from the builder or the environment. Please set a project ID using the builder.
at com.google.common.base.Preconditions.checkArgument(Preconditions.java:92)
at com.google.cloud.ServiceOptions.<init>(ServiceOptions.java:324)
at com.google.cloud.datastore.DatastoreOptions.<init>(DatastoreOptions.java:85)
at com.google.cloud.datastore.DatastoreOptions.<init>(DatastoreOptions.java:32)
at com.google.cloud.datastore.DatastoreOptions$Builder.build(DatastoreOptions.java:75)
at com.google.cloud.datastore.DatastoreOptions.defaultInstance(DatastoreOptions.java:123)
Here's my code:
Datastore datastore = DatastoreOptions.defaultInstance().service();
KeyFactory keyFactory = datastore.newKeyFactory().kind("keyKind");
Key key = keyFactory.newKey("keyName");
Entity entity = Entity.builder(key)
.set("name", "John Doe")
.set("age", 30)
.set("access_time", DateTime.now())
.build();
datastore.put(entity);
How do I fix this error?
解决方案
Are you running AE standard or AE Flexible?
Make sure you have the App Engine api jar in your classpath (WEB-INF/lib directory).
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