pjs.define()

The pjs.define() API is used within Profound.js modules to declare fields, arrays, and data structures with a strong data type. All IBM i data types are available.

To declare fields that are loosely typed, use the var clause in JavaScript instead.

Parameters

Field name (String)
Config (Object)

Config object

A config object is required when defining fields. It is what gives your field attributes, like type, length, and decimal places. The following config properties are available:

Property name	Property type	Description
type	String	The following data types can be specified: "packed decimal" or "packed" (both variations have the same meaning) "decimal" or "zoned" or "zoned decimal" or "numeric" (all variations have the same meaning) "integer" "unsigned integer" "char" "boolean" "date" "time" "timestamp" "pointer" "data structure" Some config properties only apply to certain types.
length	Number	Specifies the field length. It is required for most data types; exceptions are: date time timestamp pointer data structure
decimals	Number	Specifies the number of decimal positions. It required for packed and zoned fields.
varying	Boolean	Specifies that a character field is of varying length; otherwise, the field will be a fixed length field padded with spaces.
initValue	String/Number/Boolean/Array	Specified the field's initial value.
dim	Number	This property turns the definition into an array. When declared this way, arrays start with an index of 1, similar to RPG.
orderBy	String	Specifies the default sort order for arrays declared with the dim property. The orderBy property is used by array-related API, such as pjs.lookup(). Possible values are: "ASCEND" "DESCEND"
elements	Object	Specifies an object of subfields for a data structure. Each property within the object is the subfield name, while the property value is another config object.
qualified	Boolean	Identifies a data structure as qualified, meaning that all references to its subfields must be qualified with the data structure name first; for example: MyDS.mysubfield = "myvalue". If qualifies is not specified, the subfields can be referenced directly; for example: mysubfield = "myvalue".
special	String	Available to data-structure subfields. Acceptable values are: PSDS "status" "proc" "parm" "routine" INFDS "file" "record" "opcode" "status" "*routine"
nullable	Boolean / String	Use this property to create null-capable fields. Pass in true to make the field null-capable. This option also allows you to assign a null value to the field. Pass in a string, which references a Boolean field to use as the null-indicator and makes the field null-capable.
likeRec	Object	Available when using a data structure type. This object requires two elements. intrecname - String, name of record format from previously defined table. fields - optional String value of "key". If "key" is specified, only key fields will be defined. When likerec is specified, the data structure becomes qualified automatically.
likeDS	String	Used on a data structure to specify the name of another data structure from which the configuration is derived.
dataArea	String	Available to all data types, except from the pointer type. String pointing to data-area object. Example values: MYDTAARA PRODLIB/DTAATA
statusDS	Boolean	Identifies a Status Data Structure. A Status Data Structure is automatically populated with information about the current Profound.js module and job. It is an easy way to retrieve information, such as the current IBM i job name, the current user id, and more.

Examples

Example 1: packed decimal

pjs.define("Num", { type: 'packed decimal', length: 3, decimals: 2 });
Num = 5;

Example 2: date with initValue

pjs.define("loandate", { type: 'date', initValue: pjs.date('2000-01-01') });

Example 3: char field with pointer to that field

pjs.define("stg", { type: 'char', length: 4 });
pjs.define("ptr", { type: 'pointer', initValue: pjs.getBuffer("stg") });

Example 4: char field array with initValue

This does mean that every element in this array will be initilized with the initValue.

pjs.define("arr", { type: 'char', length: 10, dim: 3, initValue: '0123456789' });

Data structures

When you declare a field of data-structure type, this means you need to provide an 'elements' object. Each key in this object will be the name of the subfield and the value of this key will be another config element. If a data-structure is qualified, the data-structure will act similar to a JavaScript object.

Example 5: Data structure with two subfields (non-qualified)

pjs.define("someDS", { type: 'data structure', elements: {
  "Field1": { type: 'char', length: 10, initValue: '1' },
  "Field2": { type: 'char', length: 10 }
}});
 
Field2 = '2';

Example 6: Data structure array, qualified and two subfields

pjs.define("dsarr", { type: 'data structure', qualified: true, dim: 2, elements: {
  "field1": { type: 'char', length: 1 },
  "field2": { type: 'char', length: 1 }
}});
 
dsarr[1].field1 = '1';
dsarr[1].field2 = '2';
dsarr[2].field1 = '3';
dsarr[2].field2 = '4';

Example 7: Null-capable field with null assignment

pjs.define("myNumber", { 
  type: 'packed decimal',
  length: 10,
  decimals: 0,
  nullable: true 
});

//Set value to 5
myNumber = 5;

//Set null-indicator to true
myNumber = null;

//Set value to 10, sets the null-indicator to false
myNumber = 10;

//Set null-indicator to true
pjs.nullInd(myNumber, true);