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How to restrict two columns not to have the same value using Django?


How to restrict two columns not to have the same value using Django?

By : Vinod Naidu
Date : November 21 2020, 11:01 PM
With these it helps Doing in in the model is ugly/not recommended, you would need something like:
code :
class MyModel(models.Model):
    type1 = models.IntegerField()
    type2 = models.IntegerField()

    def save(self, *args, **kwargs):        
        if self.type1 != self.type2:
            return super().save(*args, **kwargs)
        else:
            return   # cancel the save - which isn't recommended 
class MyForm(forms.Form):
    type1 = forms.IntegerField()
    type2 = forms.IntegerField()

    def clean(self):
        cleaned_data = super().clean()
        if cleaned_data['type1'] == cleaned_data['type2']:
            raise forms.ValidationError("Type1 and Type2 need to be different")


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Restrict the columns represented in ActiveRecord

Restrict the columns represented in ActiveRecord


By : Julyan Boss
Date : March 29 2020, 07:55 AM
Does that help use default_scope
e.g.
code :
class MyModel < ActiveRecord::Base
  default_scope select("column1, column2, column3")

  ...
end
How to restrict SQL columns based on id of requester?

How to restrict SQL columns based on id of requester?


By : CBoris
Date : March 29 2020, 07:55 AM
With these it helps To implement option 2, I would have a column permissions table something like the following:
code :
CREATE TABLE ColumnPerms
(
    user_or_role      Varchar(50),
    table_name        Varchar(50),
    column_name       Varchar(50),
)

CREATE INDEX ix_Columnperms(user_or_role, table_name)
SELECT column_name 
  FROM ColumnPerms 
 WHERE user_or_role = '@manager'
   AND table = 'Payroll'
   AND column_name IN ('first_name', 'last_name', 'hire_date', 'base_salary', 'bonus')
How to restrict other columns data getting updated while updating specific columns of a table

How to restrict other columns data getting updated while updating specific columns of a table


By : New_Here123890
Date : March 29 2020, 07:55 AM
hope this fix your issue In your code you're merging a new object with all null fields except remarks with an object already persistent in the db. That's not the right way: from the Hibernate reference manual:
code :
@Test
    public void updateProject() {
        try {
            // Load the project entity from the DB using it's id 234L
            project.setRemarks("from junit");
            projectService.save(project);
        } catch (Exception e) {
            System.out.println("error" + e.getMessage());
            e.printStackTrace();
        }
    }
@Override
    public Project load(Long id) {    
        return entityManager.find(Project.class, id);
    }
How to Restrict Virtual Computed columns?

How to Restrict Virtual Computed columns?


By : LTabes
Date : March 29 2020, 07:55 AM
this one helps. I want to restrict a virtual computed column in my sql query. I don't have any idea how to do it. Here's my query , Will something like this work for you.
code :
CREATE TABLE #Complaint(
     id                 INT IDENTITY(1,1)
    ,Chief_Complaint    NVARCHAR(100)
    ,ComplaintDate      DATETIME
)

INSERT INTO #Complaint
    ( Chief_Complaint, ComplaintDate)
VALUES
     ( 'Complaint1', '20160101')
    ,( 'Complaint1', '20160101')
    ,( 'Complaint1', '20160101')
    ,( 'Complaint2', '20160101')
    ,( 'Complaint2', '20160101')
    ,( 'Complaint3', '20160101')

    ,( 'Complaint1', '20160201')
    ,( 'Complaint1', '20160201')
    ,( 'Complaint2', '20160201')
    ,( 'Complaint2', '20160201')
    ,( 'Complaint2', '20160201')


;WITH cteComplaints
AS(
    SELECT
        C.Chief_Complaint
        ,CASE WHEN DATENAME( month, C.ComplaintDate ) = 'January'
            THEN COUNT( C.Chief_Complaint)
         END    'January_CASES'
        ,CASE WHEN DATENAME( month, C.ComplaintDate ) = 'February'
            THEN COUNT( C.Chief_Complaint)
         END    'February_CASES'
    FROM
        #Complaint C
    GROUP BY
        C.Chief_Complaint,DATENAME( month, C.ComplaintDate )
)
SELECT
    C.Chief_Complaint
    ,SUM(ISNULL(C.January_CASES,0)) 'January_CASES'
    ,SUM(ISNULL(C.February_CASES,0)) 'February_CASES'
FROM
    cteComplaints   C
GROUP BY
    C.Chief_Complaint

DROP TABLE #Complaint
How would I restrict access to certain columns in Redshift?

How would I restrict access to certain columns in Redshift?


By : Dzaft
Date : March 29 2020, 07:55 AM
wish of those help This can be accomplished by creating a View of the columns that are permitted. Then, grant the user/group permission to use the View, but not the Table.
It would be something like:
code :
CREATE VIEW my_view AS SELECT col1, col3 from my_table;
GRANT SELECT ON my_view TO GROUP restricted_group;
REVOKE ALL ON my_table FROM GROUP restricted_group;
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