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objectbox-python | ObjectBox - the super-fast database | SQL Database library

 by   objectbox Python Version: v0.4.0 License: Apache-2.0

 by   objectbox Python Version: v0.4.0 License: Apache-2.0

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kandi X-RAY | objectbox-python Summary

objectbox-python is a Python library typically used in Database, SQL Database applications. objectbox-python has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can install using 'pip install objectbox-python' or download it from GitHub, PyPI.
To actually use the database, you launch (or "build") it with the model you’ve just defined. Afterwards, you can reuse the instance (ob in the example below) and use it to access "Entity Boxes" which hold your objects.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • objectbox-python has a low active ecosystem.
  • It has 29 star(s) with 4 fork(s). There are 6 watchers for this library.
  • There were 1 major release(s) in the last 12 months.
  • There are 5 open issues and 4 have been closed. On average issues are closed in 240 days. There are no pull requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of objectbox-python is v0.4.0
objectbox-python Support
Best in #SQL Database
Average in #SQL Database
objectbox-python Support
Best in #SQL Database
Average in #SQL Database

quality kandi Quality

  • objectbox-python has 0 bugs and 49 code smells.
objectbox-python Quality
Best in #SQL Database
Average in #SQL Database
objectbox-python Quality
Best in #SQL Database
Average in #SQL Database

securitySecurity

  • objectbox-python has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • objectbox-python code analysis shows 0 unresolved vulnerabilities.
  • There are 1 security hotspots that need review.
objectbox-python Security
Best in #SQL Database
Average in #SQL Database
objectbox-python Security
Best in #SQL Database
Average in #SQL Database

license License

  • objectbox-python is licensed under the Apache-2.0 License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
objectbox-python License
Best in #SQL Database
Average in #SQL Database
objectbox-python License
Best in #SQL Database
Average in #SQL Database

buildReuse

  • objectbox-python releases are available to install and integrate.
  • Deployable package is available in PyPI.
  • Build file is available. You can build the component from source.
  • Installation instructions, examples and code snippets are available.
  • It has 998 lines of code, 82 functions and 22 files.
  • It has low code complexity. Code complexity directly impacts maintainability of the code.
objectbox-python Reuse
Best in #SQL Database
Average in #SQL Database
objectbox-python Reuse
Best in #SQL Database
Average in #SQL Database
Top functions reviewed by kandi - BETA

kandi has reviewed objectbox-python and discovered the below as its top functions. This is intended to give you an instant insight into objectbox-python implemented functionality, and help decide if they suit your requirements.

  • Store multiple objects .
  • Measure performance .
  • Marshal an object into a flat buffer .
  • Download a file .
  • Add an entity to the model .
  • Build an object box .
  • Return the object type .
  • Decorator to create a function .
  • Return the name of the shlib library .
  • A context manager to write a transaction .

objectbox-python Key Features

automatic transactions (ACID compliant)

bulk operations

Getting started

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pip install --upgrade objectbox

Model IDs and UIDs

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from objectbox.model import *

@Entity(id=1, uid=1)
class Person:
    id = Id(id=1, uid=1001)
    name = Property(str, id=2, uid=1002)
    is_enabled = Property(bool, id=3, uid=1003)
    # int can be stored with 64 (default), 32, 16 or 8 bit precision.
    int64 = Property(int, id=4, uid=1004)
    int32 = Property(int, type=PropertyType.int, id=5, uid=1005)
    int16 = Property(int, type=PropertyType.short, id=6, uid=1006)
    int8 = Property(int, type=PropertyType.byte, id=7, uid=1007)
    # float can be stored with 64 or 32 (default) bit precision.
    float64 = Property(float, id=8, uid=1008)
    float32 = Property(float, type=PropertyType.float, id=9, uid=1009)
    byte_array = Property(bytes, id=10, uid=1010)
    # Regular properties are not stored.
    transient = ""

Using ObjectBox

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import objectbox
# from mypackage.model import Person

# Configure ObjectBox: should be done only once in the whole program and the "ob" variable should be kept around
model = objectbox.Model()
model.entity(Person, last_property_id=objectbox.model.IdUid(10, 1010))
model.last_entity_id = objectbox.model.IdUid(1, 1)
ob = objectbox.Builder().model(model).directory("db").build()

# Open the box of "Person" entity. This can be called many times but you can also pass the variable around
box = objectbox.Box(ob, Person)

id = box.put(Person(name="Joe Green"))  # Create
person = box.get(id)  # Read
person.name = "Joe Black"
box.put(person)       # Update
box.remove(person)    # Delete

License

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Copyright 2019-2021 ObjectBox Ltd. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Community Discussions

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QUESTION

psql: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory

Asked 2022-Apr-04 at 15:46

Not really sure what caused this but most likely exiting the terminal while my rails server which was connected to PostgreSQL database was closed (not a good practice I know but lesson learned!)

I've already tried the following:

  1. Rebooting my machine (using MBA M1 2020)
  2. Restarting PostgreSQL using homebrew brew services restart postgresql
  3. Re-installing PostgreSQL using Homebrew
  4. Updating PostgreSQL using Homebrew
  5. I also tried following this link but when I run cd Library/Application\ Support/Postgres terminal tells me Postgres folder doesn't exist, so I'm kind of lost already. Although I have a feeling that deleting postmaster.pid would really fix my issue. Any help would be appreciated!

ANSWER

Answered 2022-Jan-13 at 15:19

Resetting PostgreSQL

My original answer only included the troubleshooting steps below, and a workaround. I now decided to properly fix it via brute force by removing all clusters and reinstalling, since I didn't have any data there to keep. It was something along these lines, on my Ubuntu 21.04 system:

sudo pg_dropcluster --stop 12 main
sudo pg_dropcluster --stop 14 main
sudo apt remove postgresql-14
sudo apt purge postgresql*
sudo apt install postgresql-14

Now I have:

$ pg_lsclusters
Ver Cluster Port Status Owner    Data directory              Log file
14  main    5432 online postgres /var/lib/postgresql/14/main /var/log/postgresql/postgresql-14-main.log

And sudo -u postgres psql works fine. The service was started automatically but it can be done manually with sudo systemctl start postgresql.

Incidentally, I can recommend the PostgreSQL docker image, which eliminates the need to bother with a local installation.

Troubleshooting

Although I cannot provide an answer to your specific problem, I thought I'd share my troubleshooting steps, hoping that it might be of some help. It seems that you are on Mac, whereas I am running Ubuntu 21.04, so expect things to be different.

This is a client connection problem, as noted by section 19.3.2 in the docs.

The directory in my error message is different:

$ sudo su postgres -c "psql"
psql: error: connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: No such file or directory
        Is the server running locally and accepting connections on that socket?

I checked what unix sockets I had in that directory:

$ ls -lah /var/run/postgresql/
total 8.0K
drwxrwsr-x  4 postgres postgres  160 Oct 29 16:40 .
drwxr-xr-x 36 root     root     1.1K Oct 29 14:08 ..
drwxr-s---  2 postgres postgres   40 Oct 29 14:33 12-main.pg_stat_tmp
drwxr-s---  2 postgres postgres  120 Oct 29 16:59 14-main.pg_stat_tmp
-rw-r--r--  1 postgres postgres    6 Oct 29 16:36 14-main.pid
srwxrwxrwx  1 postgres postgres    0 Oct 29 16:36 .s.PGSQL.5433
-rw-------  1 postgres postgres   70 Oct 29 16:36 .s.PGSQL.5433.lock

Makes sense, there is a socket for 5433 not 5432. I confirmed this by running:

$ pg_lsclusters
Ver Cluster Port Status                Owner    Data directory              Log file
12  main    5432 down,binaries_missing postgres /var/lib/postgresql/12/main /var/log/postgresql/postgresql-12-main.log
14  main    5433 online                postgres /var/lib/postgresql/14/main /var/log/postgresql/postgresql-14-main.log

This explains how it got into this mess on my system. The default port is 5432, but after I upgraded from version 12 to 14, the server was setup to listen to 5433, presumably because it considered 5432 as already taken. Two alternatives here, get the server to listen on 5432 which is the client's default, or get the client to use 5433.

Let's try it by changing the client's parameters:

$ sudo su postgres -c "psql --port=5433"
psql (14.0 (Ubuntu 14.0-1.pgdg21.04+1))
Type "help" for help.

postgres=#

It worked! Now, to make it permanent I'm supposed to put this setting on a psqlrc or ~/.psqlrc file. The thin documentation on this (under "Files") was not helpful to me as I was not sure on the syntax and my attempts did not change the client's default, so I moved on.

To change the server I looked for the postgresql.conf mentioned in the documentation but could not find the file. I did however see /var/lib/postgresql/14/main/postgresql.auto.conf so I created it on the same directory with the content:

port = 5432

Restarted the server: sudo systemctl restart postgresql

But the error persisted because, as the logs confirmed, the port did not change:

$ tail /var/log/postgresql/postgresql-14-main.log
...
2021-10-29 16:36:12.195 UTC [25236] LOG:  listening on IPv4 address "127.0.0.1", port 5433
2021-10-29 16:36:12.198 UTC [25236] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5433"
2021-10-29 16:36:12.204 UTC [25237] LOG:  database system was shut down at 2021-10-29 16:36:12 UTC
2021-10-29 16:36:12.210 UTC [25236] LOG:  database system is ready to accept connections

After other attempts did not succeed, I eventually decided to use a workaround: to redirect the client's requests on 5432 to 5433:

ln -s /var/run/postgresql/.s.PGSQL.5433 /var/run/postgresql/.s.PGSQL.5432

This is what I have now:

$ ls -lah /var/run/postgresql/
total 8.0K
drwxrwsr-x  4 postgres postgres  160 Oct 29 16:40 .
drwxr-xr-x 36 root     root     1.1K Oct 29 14:08 ..
drwxr-s---  2 postgres postgres   40 Oct 29 14:33 12-main.pg_stat_tmp
drwxr-s---  2 postgres postgres  120 Oct 29 16:59 14-main.pg_stat_tmp
-rw-r--r--  1 postgres postgres    6 Oct 29 16:36 14-main.pid
lrwxrwxrwx  1 postgres postgres   33 Oct 29 16:40 .s.PGSQL.5432 -> /var/run/postgresql/.s.PGSQL.5433
srwxrwxrwx  1 postgres postgres    0 Oct 29 16:36 .s.PGSQL.5433
-rw-------  1 postgres postgres   70 Oct 29 16:36 .s.PGSQL.5433.lock

This means I can now just run psql without having to explicitly set the port to 5433. Now, this is a hack and I would not recommend it. But in my development system I am happy with it for now, because I don't have more time to spend on this. This is why I shared the steps and the links so that you can find a proper solution for your case.

Source https://stackoverflow.com/questions/69754628

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install objectbox-python

First of all, install the latest version:. To start using ObjectBox as a storage for your data, you need to define your model first. The model consists of Python classes annotated with @Entity decorator.

Support

Also, please let us know your feedback by opening an issue: for example, if you experience errors or if you have ideas for how to improve the API. Thanks!.

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