notnull Questions
4
I'm using PostgreSQL and GORM in my Go app.
I thought that using the sql tab of sql:"not null" would do the trick of preventing a null entry, but when go initializes structs with a string type the...
12
Solved
Is it possible to do a select statement that takes only NOT NULL values?
Right now I am using this:
SELECT * FROM table
And then I have to filter out the null values with a php loop.
Is there ...
4
I'm trying to build a simple application where the user isn't allowed to insert duplicate values.
I'm trying PRIMARY KEY as one of the constraints and NOT NULL also. But NOT NULL doesn't seem to wo...
Porush asked 8/3, 2015 at 11:13
2
Solved
According to the SQLite documentation / FAQ a column declared INTEGER PRIMARY KEY will automatically get a value of +1 the highest of the column if omitted.
Using SQLite version 3.22.0 2018-01-22 1...
Auction asked 1/3, 2018 at 17:52
2
Solved
I was setting up my project when I saw this on a @NotNull annotation in my DTOs
Not 'javax.validation.constraints.NotNull' but 'org.jetbrains.annotations.NotNull' would be used for code generation...
Mala asked 5/9, 2018 at 7:51
4
Solved
I'm implementing a custom data structure that gives me some properties of sets and other properties of lists. For most of the implemented methods though, I get this weird warning in IntelliJ IDEA o...
Autobiographical asked 30/6, 2014 at 17:13
4
Solved
What's the point of adding NOT NULL to a primary key field? Primary key is already not null + unique.
Here is an example:
CREATE TABLE student (
id int(11) AUTO_INCREMENT NOT NULL,
name varchar(2...
Quirinus asked 17/8, 2010 at 13:47
3
Solved
If a 3rd party requests an argument attachments in a method, how may I avoid using an if and break method chaining, knowing that my argument may be null? The method has the following definition.
/...
Miocene asked 27/4, 2020 at 22:27
3
Solved
I was reading References, simply and got to the part talking about using optional references. One of the reasons Herb gives to avoid optional<T&> is because those situations can be "...
Burglar asked 26/9, 2022 at 15:50
1
Solved
I have a dataframe with very mixed columns. I am trying to set all occurrences of None or NaN to None.
I am trying the answer to this question: Use None instead of np.nan for null values in pandas ...
8
Solved
I have tried:
ALTER TABLE MY_TABLE
ADD STAGE INT NOT NULL;
But it gives this error message:
ALTER TABLE only allows columns to be added that can contain nulls or
have a DEFAULT definition s...
Motheaten asked 16/8, 2010 at 12:10
17
Solved
I am using SQL Server 2005. I have a table with a text column and I have many rows in the table where the value of this column is not null, but it is empty. Trying to compare against '' yields this...
Kei asked 28/8, 2008 at 21:9
5
Solved
In my Rails (3.2) app, I have a bunch of tables in my database but I forgot to add a few not null constraints. How can I write a migration which adds not null to an existing column?
Eulalie asked 15/2, 2012 at 0:13
2
Message : You have an error in your SQL syntax; check the manual
that corresponds to your MariaDB server version for the right syntax
to use near ''country_of_residence_id' INTEGER NOT NULL' St...
3
I want to use Jetbrains @Nullable/@NotNull Annotations in my project.
I have a class with a @NotNull field. The constructor naturally does not accept null but throws an exception instead. Of co...
Isochor asked 7/4, 2015 at 17:41
1
Solved
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 NearByS...
Statolatry asked 7/6, 2020 at 17:15
6
Solved
I would like to know how to copy the properties from an Object Source to an Object Dest ignoring null values using Spring Framework.
I actually use Apache beanutils, with this code
beanUtils.s...
1
While overriding code:
@Override
public void open(ExecutionContext executionContext) {
super.open(executionContext);
from: org.springframework.batch.item.support.AbstractItemCountingItemStreamI...
Doubly asked 20/6, 2019 at 11:48
4
Solved
Is there a way to implement @NotEmpty hibernate validation without writing custom validation?
javax.validation package does not contain this annotation. Only @NotNull. But it does not validate for ...
Photocomposition asked 5/7, 2013 at 5:43
1
Might there be a way in IntelliJ 2018 to auto-generate the lines of code checking for null values passed in any argument?
I want IntelliJ to change this:
// ----------| Constructor |-------------...
Tanaka asked 5/1, 2019 at 0:0
6
Solved
Is it possible to drop all NOT NULL constraints from a table in one go?
I have a big table with a lot of NOT NULL constraints and I'm searching for a solution that is faster than dropping them sep...
Sibell asked 22/11, 2013 at 13:49
1
Solved
how can I replace NaT from a dataframe with a date/variable that was created (setup) before?
I got the following dataframe:
Date Name CF
0 NaT Peter -10
0 2017-12-14 Peter -20
1 NaT Tomas -5.5
...
2
Solved
Package has following package-info.java:
@ParametersAreNonnullByDefault
package foo;
import javax.annotation.ParametersAreNonnullByDefault;
Class has the following method:
private static String...
5
Imagine I have, say, XML-generated entity in Java that holds some data I need.
For example:
<Car>
<Engine>
<Power>
175
</Power>
</Engine>
</Car>
So if I ...
1
Solved
I have a table being populated during an ETL routine a column at a time.
The mandatory columns (which are foreign keys) are set first and at once, so the initial state of the table is:
key | fkey ...
Maggi asked 18/4, 2017 at 23:3
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