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Examples

Examples

Following is a non-exhaustive list of examples of the capabilities provided by the python library. For a complete look at what it can do, read the source code!

Creating New Items

Use the create method to add new items to the database:

from inventree.part import Part, PartCategory
from inventree.stock import StockItem

## Create a new PartCategory object,
## underneath the existing category with pk 7. Leave the parent empty for a top level category
furniture = PartCategory.create(api, {
    'name': 'Furniture',
    'description': 'Chairs, tables, etc',
    'parent': 7,
})

## Create a new Part
## Use the pk (primary-key) of the newly created category
couch = Part.create(api, {
    'name': 'Couch',
    'description': 'Long thing for sitting on',
    'category': furniture.pk,
    'active': True,
    'virtual': False,
    ## Note - You do not have to fill out *all* fields
})

Updating Attributes

Most model fields which are exposed via the API can be directly edited using the python interface, by simply calling the save() method as shown below:

from inventree.api import InvenTreeAPI
from inventree.part import Part

api = InvenTreeAPI(host='http://localhost:8000', username='admin', password='inventree')

# Retrieve part instance with primary-key of 1
part = Part(api, pk=1)

# Update specified part parameters
part.save(data={
    "description": "New part description",
    "minimum_stock": 250,
})

# Reload data from remote server
part.reload()

# Display updated data
print("Part Name:", part.name)
print("Description:", part.description)
print("Minimum stock:", part.minimum_stock)

Read Only Fields

Note that some fields are read-only and cannot be edited via the API

Adding Parameters

Each part can have multiple parameters. For the example of the sofa (above) length and weight make sense. Each parameter has a parameter template that combines the parameter name with a unit. So we first have to create the parameter templates and afterwards add the parameter values to the sofa.

from inventree.part import Parameter
from inventree.part import ParameterTemplate

LengthTemplate = ParameterTemplate.create(api, { 'name' : 'Length', 'units' : 'Meters' })
WeightTemplate = ParameterTemplate.create(api, { 'name' : 'Weight', 'units' : 'kg' })

ParameterLength = Parameter.create(api, { 'part': couch.pk, 'template': LengthTemplate.pk, 'data' : 2 })
ParameterWeight = Parameter.create(api, { 'part': couch.pk, 'template': WeightTemplate.pk, 'data' : 60 })
These parameter templates need to be defined only once and can be used for all other parts. Lets finally add a picture.

couch.uploadImage('my_nice_couch.jpg')

Adding Location Data

If we have several sofas on stock we need to know there we have stored them. So let’s add stock locations to the part. Stock locations can be organized in a hierarchical manner e.g. boxes in shelves in aisles in rooms. So each location can have a parent. Let’s assume we have 10 sofas in box 12 and 3 sofas in box 13 located in shelve 43 aisle 3. First we have to create the locations, afterwards we can put the sofas inside.

from inventree.stock import StockLocation
from inventree.stock import StockItem

...

## Create the stock locations. Leave the parent empty for top level hierarchy
Aisle3 = StockLocation.create(api, {'name':'Aisle 3','description':'Aisle for sofas','parent':''})
Shelve43 = StockLocation.create(api, {'name':'Shelve 43','description':'Shelve for sofas','parent':Aisle3.pk})
Box12 = StockLocation.create(api, {'name':'Box 12','description':'green box','parent':Shelve43.pk})
Box13 = StockLocation.create(api, {'name':'Box 13','description':'red box','parent':Shelve43.pk})

## Now fill them with items
Id1 = StockItem.create(api, { 'part': sofa.pk, 'quantity': 10, 'notes': 'new ones', 'location': Box12.pk, ‘status’:10 })
Id2 = StockItem.create(api, { 'part': sofa.pk, 'quantity': 3, 'notes': 'old ones', 'location': Box13.pk, ‘status’:55 })
Please recognize the different status flags. 10 means OK, 55 means damaged. We have the following choices:

  • 10: OK
  • 50: Attention needed
  • 55: Damaged
  • 60: Destroyed
  • 65: Rejected
  • 70: Lost
  • 85: Returned

Adding Manufacturers and Supplier

We can add manufacturers and suppliers to parts. We first need to create two companies, ACME (manufacturer) and X-Store (supplier).

from inventree.company import Company

...

acme = Company.create(api, {
    'name' : 'ACME',
    'description':'A Company that makes everything',
    'website':'https://www.acme.bla',
    'is_customer':0,
    'is_manufacturer':1,
    'is_supplier':0
})
xstore = Company.create(api, {
    'name' : 'X-Store',
    'description':'A really cool online store',
    'website':'https://www.xst.bla',
    'is_customer':0,
    'is_manufacturer':0,
    'is_supplier':1
})

Please recognize the different flag settings for is_supplier and is_manufacturer. Now lets add those to our couch:

from inventree.company import SupplierPart

...

SupplierPart.create(api,{
    'part':couch.pk,
    'supplier':xstore.pk,
    'SKU':'some_code',
    'link':'https://www.xst.bla/products/stock?...'
})
ManufacturerPart.create(api,{
    'part':couch.pk,
    'manufacturer':acme.pk,
    'MPN':'Part code of the manufacturer'
})

Stock Adjustments

Various stock adjustment actions can be performed as follows:

from inventree.stock import StockItem, StockLocation

# Fetch item from the server
item = StockItem(api, pk=99)

# Count stock
item.countStock(500)

# Add stock to the item
item.addStock(15)

# Remove stock from the item
item.removeStock(25)

# Transfer partial quantity to another location
loc = StockLocation(api, pk=12)
item.transferStock(loc, quantity=50)

Delete a Part

To delete a Part instance, first in needs to be marked as inactive (otherwise it will throw an error):

from inventree.part import Part

part = Part(api, pk=10)
part.save(data={'active': False})
part.delete()

Bulk Delete

Some database models support bulk delete operations, where multiple database entries can be deleted in a single API query.

from inventree.stock import StockItem

# Delete all items in a particular category
StockItem.bulkDelete(api, filters={'category': 3})

Upload Attachments

We have the possibility to upload attachments against a particular Part. We can use pdf for documents but also other files like 3D drawings or pictures. To do so we add the following commands:

from inventree.part import PartAttachment

# The ID of the Part to attach the files to
part_id = 47

PartAttachment.upload(api, part_id, 'manual.pdf', comment='Datasheet')
PartAttachment.upload(api, part_id, 'sofa.dxf', comment='Drawing')

Alternatively, we can upload an attachment directly against the Part instance:

from inventree.part import Part

part = Part(api, pk=47)

part.uploadAttachment('data.txt', comment='A data file')

Adding a Bill of Materials

Imagine your sofa is made from three parts: one seat, one back and two arm rests. To enable this the assembly flag of the sofa part has to be set. You need to have all three parts in you InvenTree database.

A BOM (Bill of Materials) contains BOM items. These are separate records in the database that refer to the master assembly (the part) and the component which is being used (the sub_part).

BOM Items can be created using the Python API interface as follows:

BomItem.create(api, data={'part':sofa_id, 'sub_part':back_id, 'quantity':1, 'reference':'p1'})
BomItem.create(api, data={'part':sofa_id, 'sub_part':seat_id, 'quantity':1, 'reference':'p2'})
BomItem.create(api, data={'part':sofa_id, 'sub_part':armrest_id, 'quantity':2, 'reference':'p3, p4'})

Now you have three BOM items that make the BOM for the sofa. The id values are the primary keys of the specified parts. The reference can be any string that names the instances.