Is it possible to have an audit table with all the column of the base table, that is updated only when a specific column is modified? If I add the #Audited annotation to my Entity class I have an audit table with all the columns, but a new row is inserted every time a field is modified; otherwise, if I add the #Audited annotation only to one property, hibernate will add a new row inside the audit table only when that property is modified, but the audit table will have only one column ( the column of the property annotated). Any suggestion?
Related
I Have two tables as
student (student_id(primary key), student_index(unique key), student_name, student_batch, student_department, student_age)
exam_result_sem_one (result_id, subject_one, subject_two, subject_three, subject_4, fk_student_id)
then I want to get all data from exam_result_sem_one by student_index with the values of student_index and student_name from student table.
I want to do this using spring data JPA instead of using native query. I hopefully waiting for an answer.
How to create a childtable from a table having a column with multiple value separted by commas
Need to create a new table with foreign key and that particular value in spring mvc
If I want to have DB table with scheme
id|column1|rest of columns...
such as:
#Entity
#Table(name = "SampleEntity")
class SampleEntity(
#Id #GeneratedValue val id: Long,
)
how can I add columns to table such that the table has these columns, but my entity does not?
I would like to be able to add these columns programmatically with a for loop. But any pointers would be appreciated.
If you want to alter table programatically just use spring-jdbc (https://www.baeldung.com/spring-jdbc-jdbctemplate) which will allow you to execute SQL queries thus make changes to table programmatically.
It is completely ok if your entity doesn't have all the columns - columns that don't have matching attributes inside of the class just will be ignored by the entity in Spring JPA. Alternatively, you could just use spring-jdbc with a custom row-mapper.
I have a default value in Database. When I was inserting a new record, that time I need to avoid the default value column in the entity.
For Example:
CreatedDate Default value in database
but in my UI I need to avoid the column CreatedDate for Inserting time
I am trying to update a table using JPA if I find that record using the primary key.During which I have a restriction should not update the record with null values.If I have a table
Employee with columns emp_id,emp_name
emp_name has a value and the new record does not have the value for emp_name in that case the old name should be retained.Is it possible?
When you find() the original employee it will have the old values. Where does your new record come from? Say it is some detached employee, then simply only overwrite the attributes that are not null into the managed employee.
JPA merge() will always merge everything. In EclipseLink you can set a FetchGroup on an entity being merged, and only the fetched attributes will be merged.