Top "Notnull" questions

Not annotated parameter overrides @??? parameter

While overriding code: @Override public void open(ExecutionContext executionContext) { super.open(executionContext); from: org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader I …

spring intellij-idea warnings nullable notnull

Oracle - Error: 'ORA-01400: cannot insert NULL into

I'm trying to insert a record into a table, but getting the error - 'ORA-01400: cannot insert NULL into (....'. …

mysql oracle migration notnull ora-01400

Understanding Optionals.orElse

I am trying to learn Java 8 feature Optional. I am confused about how Optional.orElse is working. Here is what …

java null java-8 optional notnull

PostgreSQL - empty values that are not null and not empty strings

I ran this query on a PostgreSQL table: select * wkt from table where column <>'' and column is …

sql postgresql notnull

MySQL - Foreign key on delete set null in not null field

This is probably a trivial question, but I'm still a little clumsy when it comes to foreign key constraints so …

mysql sql foreign-key-relationship create-table notnull

IntelliJ IDEA complains about null check for @NotNull parameter

I want to use Jetbrains @Nullable/@NotNull Annotations in my project. I have a class with a @NotNull field. The …

java intellij-idea annotations notnull

NotNull not working, Column(nullable = false) working

I have a Spring Entity with a field annotated with @NotNull from javax.validation.constraints @Entity public abstract class IdentifiableNamedEntity { @…

java spring jpa notnull

Rails ActiveModel Serializers render not null attributes

I want to use a serializer that renders not null attributes class PersonSerializer < ActiveModel::Serializer attributes :id, :name, :phone, :…

ruby-on-rails serialization attributes notnull

Insert Null value To an inet field in postgresql

I am trying to insert values to a table which contains two columns with inet types. When I try to …

postgresql sqlalchemy notnull

Replace NaT in a dataframe with a previous variable

how can I replace NaT from a dataframe with a date/variable that was created (setup) before? I got the …

pandas dataframe replace notnull