# config
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source
### SortableQueueConfig
``` python
def SortableQueueConfig(
prefix:str, key_field:str='id', key_fn:Optional=None, item_class:str='queue-item',
handle_class:str='drag-handle', animation_ms:int=150, queue_title:str='Selected'
)->None:
```
*Configuration for a sortable queue instance.*
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source
### get_item_key
``` python
def get_item_key(
config:SortableQueueConfig, # Queue configuration
item:dict, # Queue item dict
)->str: # Unique key string for the item
```
*Extract the unique key from a queue item using the config’s key_fn or
key_field.*
## Tests
``` python
# Default config
cfg = SortableQueueConfig(prefix="sq")
assert cfg.prefix == "sq"
assert cfg.key_field == "id"
assert cfg.key_fn is None
assert cfg.item_class == "queue-item"
assert cfg.handle_class == "drag-handle"
assert cfg.animation_ms == 150
assert cfg.queue_title == "Selected"
# Simple key extraction
item = {"id": "abc123", "name": "Test"}
assert get_item_key(cfg, item) == "abc123"
# Custom key_fn overrides key_field
cfg2 = SortableQueueConfig(prefix="sd", key_fn=lambda i: f"{i['provider']}:{i['record']}")
item2 = {"provider": "whisper", "record": "job_1"}
assert get_item_key(cfg2, item2) == "whisper:job_1"
# Missing key_field returns empty string
assert get_item_key(cfg, {"name": "no id"}) == ""
print("All config tests passed")
```