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What is the difference between persist() and merge() in JPA and Hibernate?
... entity, it
becomes managed. The entity X will be
entered into the database at or before
transaction commit or as a result of
the flush operation.
If X is a
preexisting managed entity, it is
ignored by the persist operation.
However, the persist operation is
cascaded to entities re...
Have a fixed position div that needs to scroll if content overflows
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Django-DB-Migrations: cannot ALTER TABLE because it has pending trigger events
...ee: django.readthedocs.io/en/latest/ref/migration-operations.html On databases that do support DDL transactions (SQLite and PostgreSQL), RunPython operations do not have any transactions automatically added besides the transactions created for each migration. Thus, on PostgreSQL, for example, you ...
.bashrc/.profile is not loaded on new tmux session (or window) — why?
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Convert Go map to json
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How to copy a local Git branch to a remote repo
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Linux bash: Multiple variable assignment
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See what process is using a file in Mac OS X
... lsof | grep musiclibrary showed 3 processes accessing my musiclibrary database files.
– gman
Jan 2 at 10:09
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mkdir's “-p” option
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Java Persistence / JPA: @Column vs @Basic
... nullable.
@Column allows you to specify the name of the column in the database to which the attribute is to be persisted.
If you specify one without the other then you get default behaviour which is sensible, so commonly folks use only one with the exception of special cases.
So if we wanted a ...