Azure Policy check for an empty value
来源： https://stackoverflow.com/questions/61356867/azure-policy-check-for-an-empty-value
notnull
Azure Policy check for an empty value
来源： https://stackoverflow.com/questions/61356867/azure-policy-check-for-an-empty-value
Why @vaild annotation is not working in my spring MVC application? I searched a lot, but couldn't find solution
问题 Basically it should return a message if the field is not valid. but in my case it's not working here!! below is my controller class. @Controller public class StoreController { private NearByStoreInterface getmestore; @Inject public StoreController(NearByStoreInterface getmestore) { this.getmestore=getmestore; } @RequestMapping(value = "/nearbystore", method = RequestMethod.GET) public String display(Model m) { final ControllerTolibModel userDetails=ControllerTolibModel.builder().build(); m
Validation @NotEmpty、@NotBlank 、@NotNull的区别
某厂面试归来，发现自己落伍了！>>> 几个月前踩的坑吧，今天回忆一下。 1.@NotNull：不能为null，但可以为empty 2.@NotEmpty：不能为null，而且长度必须大于0 3.@NotBlank：只能作用在String上，不能为null，而且调用trim()后，长度必须大于0 ("test") 即：必须有实际字符 @NotEmpty 用在集合类上面 @NotBlank 用在String上面 @NotNull 用在基本类型上 1. String name = null; @NotNull: false @NotEmpty: false @NotBlank: false 2. String name = ""; @NotNull: true @NotEmpty: false @NotBlank: false 3. String name = " "; @NotNull: true @NotEmpty: true @NotBlank: false 4. String name = "Great answer!"; @NotNull: true @NotEmpty: true @NotBlank: true 来源： oschina 链接： https://my.oschina.net/u/1791398/blog/1553645
Alter column default value
问题 I know you can change the default value of an existing column like this: ALTER TABLE Employee ADD CONSTRAINT DF_SomeName DEFAULT N'SANDNES' FOR CityBorn; But according to this my query supposed to work: ALTER TABLE MyTable ALTER COLUMN CreateDate DATETIME NOT NULL CONSTRAINT DF_Constraint DEFAULT GetDate() So here I'm trying to make my column Not Null and also set the Default value. But getting Incoorect Syntax Error near CONSTRAINT. Am I missing sth? 回答1: I think issue here is with the
NOT NULL constraint failed: accounts_myuser.password
问题 I am doing a web application in django where users can create accounts. I'm storing the users' passwords in plaintext as authentication in my system does not totally depend on password but also on the otp. The problem I'm facing all of a sudden(it worked fine earlier) at the POST request of registration, is "NOT NULL constraint failed: accounts_myuser.password". I tried deleting database and migrations and re-migrated but it didn't help. I'm giving the ModelForm and the Model(custom one)
ORA 01400 and ORA 02296 : Cannot insert null or modify added column properties to NOT NULL
问题 "Modify your query to add a column that subtracts the old salary from the new salary. Label the column Increase. Run the revised query." Well, as per my interpretation, I first attempted to add the column by scripting: ALTER TABLE EMPLOYEES ADD ( INCREASE2 NUMBER(6)); Then: INSERT INTO EMPLOYEES(INCREASE2) SELECT (salary*1.155) - salary FROM EMPLOYEES; Error de SQL: ORA-01400: não é possível inserir NULL em ("HR"."EMPLOYEES"."EMPLOYEE_ID") 01400. 00000 - "cannot insert NULL into (%s)" "HR".
Oracle “Cannot update to NULL”
问题 I have this query on Oracle 10g: UPDATE "SCHEMA1"."CELLS_GLIST" SET ("GLIST_VALUE_ID", "USER_ID", "SESSION_ID") = ( SELECT "GLIST_VALUE_ID", 1 AS "USER_ID", 123456 AS "SESSION_ID" FROM "SCHEMA1"."GLISTS_VALUES_UOR" WHERE ("UOR_ID"=3) AND ("GLIST_ID"=67) AND ("GLIST_VALUE_DESC" = ( SELECT "GLIST_VALUE_DESC" FROM "BMAN_TP1"."GLISTS_VALUES_UOR" WHERE ("UOR_ID"=3) AND ("GLIST_VALUE_ID"="CELLS_GLIST"."GLIST_VALUE_ID") )) ) WHERE EXISTS (......) It keeps saying ORA-01407: cannot update ("SCHEMA1".
Mark method call that it always returns not null result
问题 Scala compiler has -Xcheck-null which tries to check if there are any potential null pointer dereference in runtime. It's ok for me, but I get too much false positives, i.e. suppose I define logger : private final val LOGGER: Logger = LoggerFactory.getLogger(classOf[GenericRestImpl]) The method getLogger never returns null . How can I pass this knowledge to compiler so it will not complain? [WARNING] TestImpl.scala:31: warning: potential null pointer dereference: LOGGER.debug [WARNING] LOGGER
Library support for Scala's NotNull trait
问题 Notice: As of Scala 2.11, NotNull is deprecated. As far as I understand, if you want a reference type to be non-nullable you have to mixin the magic NotNull trait, and the compiler will automatically prevent you from putting null -able values in it. See this mailing-list thread for instance. What lacking is, a decent library support for non-nullable types. If I would like to write a package that don't need to interface java code directly, and I want to prevent all types in this package from