Package couchdb3
CouchDB3
CouchDB3 is a wrapper around the CouchDB API. For more detailed information, please refer to the documentation.
Disclaimer
Big parts of the documentation (and thus docstrings) have been copied from CouchDB's API's great official documentation.
Requirements
- Python version
>= 3.7
- CouchDB version
3.x
Installation
Installing via PyPi
pip install couchdb3
Installing via Github
python -m pip install git+https://github.com/n-Vlahovic/couchdb3.git
Installing from source
git clone https://github.com/n-Vlahovic/couchdb3
python -m pip install -e couchdb3
Quickstart
Connecting to a database server
import couchdb3
client = couchdb3.Server(
"http://user:password@127.0.0.1:5984"
)
# Checking if the server is up
print(client.up())
# True
user and password can also be passed into the Server constructor as keyword parameters, e.g.
client = couchdb3.Server(
"127.0.0.1:5984", # Scheme omitted - will assume http protocol
user="user",
password="password"
)
Both approaches are equivalent, i.e. in both cases the instance's scheme,host,port,user,password
will be identical.
Further, clients can be used with context managers:
with couchdb3.Server("http://user:password@127.0.0.1:5984") as client:
# Do stuff
...
Getting or creating a database
dbname = "mydb"
db = client.get(dbname) if dbname in client else client.create(dbname)
print(db)
# Database: mydb
Creating a document
mydoc = {
"_id": "mydoc-id",
"name": "Hello",
"type": "World"
}
print(db.save(mydoc))
# ('mydoc-id', True, '1-24fa3b3fd2691da9649dd6abe3cafc7e')
Note: Database.save
requires the document to have an id (i.e. a key _id
),
Database.create
does not.
Updating a document
To update an existing document, retrieving the revision is paramount.
In the example below, dbdoc
contains the key _rev
and the builtin dict.update
function is used to update the
document before saving it.
mydoc = {
"_id": "mydoc-id",
"name": "Hello World",
"type": "Hello World"
}
dbdoc = db.get(mydoc["_id"])
dbdoc.update(mydoc)
print(db.save(dbdoc))
# ('mydoc-id', True, '2-374aa8f0236b9120242ca64935e2e8f1')
Alternatively, one can use Database.rev
to fetch the latest revision and overwrite the document
mydoc = {
"_id": "mydoc-id",
"_rev": db.rev("mydoc-id"),
"name": "Hello World",
"type": "Hello World"
}
print(db.save(mydoc))
# ('mydoc-id', True, '3-d56b14b7ffb87960b51d03269990a30d')
Deleting a document
To delete a document, the docid
and rev
are needed
docid = "mydoc-id"
print(db.delete(docid=docid, rev=db.rev(docid))) # Fetch the revision on the go
# True
Working with partitions
For a partitioned database, the Partition
class offers a wrapper around partitions (acting similarly
to collections in Mongo).
from couchdb3 import Server, Database, Partition
client: Server = Server(...)
db: Database = client["some-db"]
partition: Partition = db.get_partition("partition_id")
Partition instances append the partition's ID the document IDs (partition-id:doc-id
) for a simpler user interaction,
e.g.
doc_id = "test-id"
print(doc_id in partition) # no need to append the partition's ID
rev = partition.rev(doc_id)
partition.save({
"_id": doc_id, # no need to append the partition's ID
"_rev": rev,
...
})
The partition ID will only be appended provided document IDs do not start with partition-id
, e.g. the following will
work and be equivalent to the previous example
doc_id = "partition_id:test-id"
print(doc_id in partition)
rev = partition.rev(doc_id)
partition.save({
"_id": doc_id,
"_rev": rev,
...
})
Expand source code
__doc__ = """# CouchDB3
*CouchDB3* is a wrapper around the CouchDB API. For more detailed information, please refer to
[the documentation](https://n-vlahovic.github.io/couchdb3/).
## Disclaimer
Big parts of the documentation (and thus docstrings) have been copied from CouchDB's API's great
[official documentation](https://docs.couchdb.org/en/main/api/index.html).
## Requirements
- Python version `>= 3.7`
- CouchDB version `3.x`
## Installation
Installing via PyPi
```bash
pip install couchdb3
```
Installing via Github
```bash
python -m pip install git+https://github.com/n-Vlahovic/couchdb3.git
```
Installing from source
```bash
git clone https://github.com/n-Vlahovic/couchdb3
python -m pip install -e couchdb3
```
## Quickstart
### Connecting to a database server
```python
import couchdb3
client = couchdb3.Server(
"http://user:password@127.0.0.1:5984"
)
# Checking if the server is up
print(client.up())
# True
```
user and password can also be passed into the Server constructor as keyword parameters, e.g.
```python
client = couchdb3.Server(
"127.0.0.1:5984", # Scheme omitted - will assume http protocol
user="user",
password="password"
)
```
Both approaches are equivalent, i.e. in both cases the instance's `scheme,host,port,user,password` will be identical.
Further, clients can be used with context managers:
```python
with couchdb3.Server("http://user:password@127.0.0.1:5984") as client:
# Do stuff
...
```
### Getting or creating a database
```python
dbname = "mydb"
db = client.get(dbname) if dbname in client else client.create(dbname)
print(db)
# Database: mydb
```
### Creating a document
```python
mydoc = {
"_id": "mydoc-id",
"name": "Hello",
"type": "World"
}
print(db.save(mydoc))
# ('mydoc-id', True, '1-24fa3b3fd2691da9649dd6abe3cafc7e')
```
Note: `Database.save` requires the document to have an id (i.e. a key `_id`),
`Database.create` does not.
### Updating a document
To update an existing document, retrieving the revision is paramount.
In the example below, `dbdoc` contains the key `_rev` and the builtin `dict.update` function is used to update the
document before saving it.
```python
mydoc = {
"_id": "mydoc-id",
"name": "Hello World",
"type": "Hello World"
}
dbdoc = db.get(mydoc["_id"])
dbdoc.update(mydoc)
print(db.save(dbdoc))
# ('mydoc-id', True, '2-374aa8f0236b9120242ca64935e2e8f1')
```
Alternatively, one can use `Database.rev` to fetch the latest revision and overwrite the document
```python
mydoc = {
"_id": "mydoc-id",
"_rev": db.rev("mydoc-id"),
"name": "Hello World",
"type": "Hello World"
}
print(db.save(mydoc))
# ('mydoc-id', True, '3-d56b14b7ffb87960b51d03269990a30d')
```
### Deleting a document
To delete a document, the `docid` and `rev` are needed
```python
docid = "mydoc-id"
print(db.delete(docid=docid, rev=db.rev(docid))) # Fetch the revision on the go
# True
```
### Working with partitions
For a partitioned database, the `couchdb3.database.Partition` class offers a wrapper around partitions (acting similarly
to collections in Mongo).
```python
from couchdb3 import Server, Database, Partition
client: Server = Server(...)
db: Database = client["some-db"]
partition: Partition = db.get_partition("partition_id")
```
Partition instances append the partition's ID the document IDs (`partition-id:doc-id`) for a simpler user interaction,
e.g.
```python
doc_id = "test-id"
print(doc_id in partition) # no need to append the partition's ID
rev = partition.rev(doc_id)
partition.save({
"_id": doc_id, # no need to append the partition's ID
"_rev": rev,
...
})
```
The partition ID will only be appended provided document IDs do not start with `partition-id`, e.g. the following will
work and be equivalent to the previous example
```python
doc_id = "partition_id:test-id"
print(doc_id in partition)
rev = partition.rev(doc_id)
partition.save({
"_id": doc_id,
"_rev": rev,
...
})
```
"""
from . import exceptions
from . import utils
from .database import Database, Partition
from .document import Document
from .server import Server
from .view import ViewResult, ViewRow
Sub-modules
couchdb3.base
couchdb3.database
couchdb3.document
couchdb3.exceptions
couchdb3.server
couchdb3.utils
couchdb3.view