Additional Features

Additional Features for Columns and Fields

KtorAdmin provides various enhancements for defining and managing database columns. Below are some key features:

Computed Columns

Use @Computed to define a column whose value is dynamically computed using a JavaScript expression. This allows referencing other columns and transforming their values.

val name = varchar("name", 150)

@Computed(
    compute = "{name}.toLowerCase().replaceAll(' ', '-')"
)
val slug = varchar("slug", 500)

For example, if name is "Ktor Admin", the generated slug will be "ktor-admin".

Parameters:

• compute → A JavaScript expression to compute the column value dynamically.

• readOnly → Indicates if the column is read-only. If set, it cannot be manually updated.

  • Note: readOnly in @Computed takes precedence over readOnly in @ColumnInfo.

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Confirmation Fields

Use @Confirmation for fields that require user confirmation before editing. This ensures sensitive values like passwords are not changed accidentally.

@Confirmation
val password = text("password")

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Overriding Column Type

If a column type is incorrectly detected or unsupported, you can manually specify its type using @OverrideColumnType.

@OverrideColumnType(ColumnType.DATETIME)
val date: Instant

This ensures the correct database type is applied to the column definition.

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Text Area Fields

Use @TextAreaField for fields that require multi-line text input, such as descriptions or long-form content. This annotation ensures proper handling in both MongoDB and SQL databases.

Example:

@TextAreaField
val description = text("description")

This annotation is useful for cases where a standard text input is not sufficient.

You can also use RichEditor for a more advanced editing experience. Learn more