Column attributes define the type of data to store in the column, relations, and connections between columns, and system behavior.

Set of attributes differs depending on the column type.

Column attributes description

AttributeMandatoryDescription

Table

Y

Specify the table in which the column should be created. If this table has child tables, then this column will also be available within them.

This field references to the Tables (sys_db_table) dictionary.

Column Type

Y

Specify a column type. The column type specifies the type of the data stored, also, depending on the type selected, additional tabs or fields may appear on the form (see below). For more information, refer to the Column Types article.

Normally, you cannot change the value of this field once the column is created. However, if you cannot avoid it, there is a workaround, described in the Change Column Settings article. Use it with caution.

Title

YA column title displayed on the form. It is preferred to be sensible and human-readable. Latin, Cyrillic, [0..9] numbers and the underscore symbol ( _ ) are allowed.

Column Name

Y

A system column name. It is preferred to be human-readable and keep the kind of stored data. Latin letters, [0..9] numbers and the underscore symbol ( _ ) are allowed.

This field is populated automatically depending on the title entered. Also, column name prefixes may be added depending on the column name creating circumstances listed below:

  1. If you create a column within any table related to vendor applications (Simple, ITSM or Personal Schedule), then this column automatically gets the "c_" prefix.
  2. If you create a column within a table related to non-vendor applications, then the prefix is not added.

Example for case 1

Column titleNew column name
New columnc_new_column

The maximum length of the column name is 63 symbols.

Normally, you cannot change the value of this field once the column is created. However, if you cannot avoid it, there is a workaround, described in the Change Column Settings article. Use it with caution.

Active

N

Select this checkbox to activate or deactivate the column.

If unselected, such field will be not available for choosing in Form Layout or List Layout.

Read Only

N

Select this checkbox to make the field read-only.

The Read Only attribute is not available for selecting when the Journal Input type is chosen in the Column Type field. 

Mandatory

NSelect this checkbox to make the field mandatory.

Full Text Search

N

Select this checkbox to make it possible to perform a Global Search against the current column.

After activating this attribute, search indices (records in the Search Indices (sys_search_index) table) for existing records will not be created automatically. To create these indices, update the records.

Display by Ref

N

When a record references to another record and the table or column containing this record has the attribute Display by Ref equal to 'true', then the column value will be displayed.

By default, this attribute is set equal to 'true' for the sys_id column (this column contains unique IDs).

If a table contains a field that has Display by Ref equal to 'true', the value of this field will be displayed when referencing this table in the Reference field of the referencing table.

Unique

NWhen selected, there is no way to add a record with a value of this field, if a record with the same value already exists.


Type Specification Tab

In SimpleOne, several column types have an extended attribute set, unlike other types. In addition to the standard fieldset, these column types demonstrate a dynamic change of the sys_db_column object attribute set depending on its type. Some of these attributes can be defined in the Type Specification tab.

Most column types can have limited number of characters defined by the Max Length field.

AttributeMandatoryDescription

Max Length

N

Specify the maximum value length for this column. The value length cannot exceed allowed length for the specified data type.

The Choice, Conditions, Reference, List, Image, Template, and Field Name column types have a specific set of fields. See the description in the sections below:

See the Choice columns article to learn more about this column type.

FieldMandatoryDescription

Choice Table

NReference to a table.

Choice Type

Y

Define whether the option "None" is applicable for the field. Available options:

  • Dropdown with --None--
  • Dropdown without --None-- (specify a default value).

If the Dropdown without --None-- is chosen, the Default value tab becomes mandatory.

Choice Field

YReference to a particular column of the table specified in the Choice Table field.

Extra Attributes

N

Enter the text below to apply radio buttons style to the choice field:

choice_decorator=radio

See the Conditions columns to learn more about this column type.

FieldMandatoryDescription
Dependent on ColumnYA reference to the Tables dictionary. Specify a table that will share the fields with the newly created column.
Extra AttributesN

You can specify the extended operators like this:

extended_operators=VALCHANGES;CHANGESFROM;CHANGESTO

So, these operators become available to use on the column view.

See the Reference Fields to learn more about this column types.

FieldMandatoryDescription
ReferenceYSpecify a dictionary with the values you need.
On DeleteN

The field appears at the Type Specification tab. It defines actions to be taken in case the referenced record is deleted. Available options:

  • No action – no actions will be taken.

  • Set NULL – the reference to this record will be deleted from the field (the value is to be NULL).
    Deleting records with the Set NULL option selected causes update errors for the records that reference this record in a mandatory reference field. The error occurs:

    Unable to update the {link} record because it references to the deleted one

  • Cascade – the record containing reference to it will be deleted as well.
  • Restrict – deleting of the referenced record is forbidden.
  • Set default value – the reference to it will be changed to the default value defined at the Default Value tab.

Set the default value at the Default Value tab if the Set Default option is chosen. In case the default value is not set, and the referenced record is deleted, the reference to this record will be deleted from the field (the value is to be NULL).

Image column type:

FieldMandatoryDescription
Extra AttributesN

Specify maximum image width and height, like this:

    • width=1600
    • height=800

Field Name and Template column types:

FieldMandatoryDescription
Dependent on ColumnY

A reference to the Tables dictionary. Specify a table that will share the fields with the newly created column.

Default Value tab

The Default Value tab is available for all column types.

AttributeMandatoryDescription

Default Value

N

Specify a default value that will be populated automatically to the field when creating a new record. This field may be specified by a Javascript scenario as well.

Use Dynamic Default

NSelect this checkbox if you want to generate the default value dynamically.

Dynamic Default

N

This field appears only when the Use Dynamic Default attribute is set to 'true'.

Select the script from the Dynamic Default Values (sys_default_value_dynamic) dictionary, so its execution result will be automatically calculated and entered into this field. This value will be the default value for the column specified.

  1. The script must preliminary be created in the Dynamic Default Values (sys_default_value_dynamic) dictionary; otherwise, you will be not able to choose it.
  2. You can choose only active scripts (the Active attribute is equal to Yes).

Reference Qualifier tab

The Reference Qualifier tab appears for the following column types:

  • Field Name
  • List
  • Reference


FieldMandatoryDescription

Reference Qualifier Type

N

Select the type of reference qualifier. Available options:

  • Simple
  • Dynamic

Reference Qualifier Condition

N

Configure the filters using the Condition Builder.

This field appears when the Reference Qualifier Type value is Simple.

Dynamic Reference Qualifier

N

Select the dynamic reference qualifier from the list.

This field appears when the Reference Qualifier Type value is Dynamic.

Reference Qualifier Fixed

NSelect this checkbox to fix the breadcrumbs in the dictionary when using this field. This functionality will block using the Condition Builder functionality in this field.



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