docs/docs/en/data-sources/data-modeling/collection-fields/basic/number.md
In NocoBase, the Number field stores numerical values that can include decimals.
It is suitable for order amounts, scores, weights, and other decimal values. For monetary values that require exact decimal precision, use decimal.
Number fields are suitable for these business scenarios:
On the collection's Configure fields page, click Add field and select Number to create this field.
| Setting | Description |
|---|---|
| Field interface | The field interface. Number uses number, which determines how the field is entered and displayed in pages. |
| Field display name | The name displayed for the field, such as Order amount, Score, or Weight. Use a name that business users can recognize. |
| Field name | The field identifier used internally by APIs, relation fields, permissions, and workflows. It usually cannot be changed after creation. It supports only letters, numbers, and underscores, and must begin with a letter. |
| Field type | The data-layer type. Number uses double by default. |
| Default value | The default value. When a new record has no value, NocoBase can fill this value automatically. |
| Validation rules | Validation rules. Supports minimum, maximum, precision, and required validation. |
| Description | A field description. Record the field meaning, entry requirements, data source, or maintainer. |
:::warning Note
Field names are referenced by page blocks, permissions, workflows, and APIs after creation. Confirm the name before creating the field to avoid later configuration changes.
:::
The default behavior of a Number field is as follows:
| Behavior | Description |
|---|---|
| Default Field interface | number. |
| Default Field type | double. |
| Available Field types | double, float, decimal. |
| Page component | Uses a number input in edit mode. |
| Filtering | Supports numerical filters such as greater than, less than, equals, and is empty. |
| Sorting | Supports sorting in Table blocks. |
| Validation | Supports minimum, maximum, precision, and required validation. |
After creation, click Edit beside the field to edit its configuration. Edit fields to adjust how they are displayed and used in NocoBase, such as the display name, description, default value, validation rules, or field-specific settings.
When a field comes from a synchronized main-database table, editing usually maps the database field to a NocoBase Field type and Field interface.
| Setting | Can be edited | Description |
|---|---|---|
| Field display name | Yes | Changes the name displayed in the interface without changing the field identifier. |
| Field name | No | The field identifier normally cannot be changed in the edit form after creation. |
| Field interface | Conditional | Main-database fields and synchronized fields can be adjusted during field mapping. Changes affect page input, display, and validation. |
| Field type | Conditional | Main-database fields and synchronized fields can be adjusted during field mapping. Confirm that existing values can be used by the new type first. |
| Default value | Yes | Adjusts the default value for new records. |
| Validation rules | Yes | Adjusts field validation rules. |
| Description | Yes | Adds the field meaning, entry requirements, data source, or maintainer. |
:::warning Note
Changing a Field type or Field interface is more than changing a display name. It affects field storage, input components, validation rules, filters, and workflow-variable usage. When the field contains substantial existing data, confirm that its data format is compatible first.
:::
Click Delete beside a Number field to delete it. You can also select multiple fields and delete them in the main data source.
Deleting a Number field created in the main database usually also deletes the actual database column and its values. For a synchronized or external-data-source field, the impact depends on the corresponding data source and field origin.
:::danger Warning
Deleting a field can affect page blocks, forms, filters, permissions, workflows, APIs, imports and exports, and existing data. Confirm that the field is no longer referenced by business configuration before deleting it.
:::
Number fields are suitable for numerical entry, calculation, statistics, and conditions.
| Scenario | Use |
|---|---|
| Form block | Enter a numerical value. |
| Table block | Display, sort, and filter numerical values. |
| Details block | Display a numerical value. |
| Workflows and permissions | Use the value in numerical conditions and calculations. |