Business objects variable editor not null

It is highly recommended to follow the standard package naming convention. Packages can be seen as logical containers, a package should contain business objects related to each other. As example, a package com. An object name. This must be a Java class name starting with a capital letter , because a business object is implemented as a Java class. These are the components of the object.

There can be any number of attributes. For each attribute, you can specify:. Business objects can be combined using composition or aggregation relationships.

They are managed using standard create, read, update, delete actions. To read a business object in a Groovy expression, use the DAO.

A business object can be updated only in a process, using an operation. In some processes, user interfaces or system activities might need to handle multiple instances of a business object. Use cases include the ability to modify data on mass for example, approving several leave requests from a list in a user form , and initializing a set of data coming from an external system for example, loading a list of products from an external datasource and saving each of them in a business object instance.

Specify that a given business data is multiple, using a checkbox in the new business data wizard. Use a java. Set the list of business object instances in an operation using takes value of with a right operand that consists of a list of existing possibly modified and new business object instances.

Delete all instances from a list of business object instances with an Is Deleted operation. A unique constraint on a single field means that every entry has a different value for this field. A unique constraint for a combination of fields means that this combination is unique, even though some of the component field values might be common or null. You can specify a unique constraint for an attribute, to require that every value of the attribute is unique. This means that you can use this attribute in data queries knowing that it is not possible for two entries to have the same value.

JPQL queries are used to get information about data objects stored in the database. A set of default queries is defined automatically for each object in the BDM. You can also create custom queries. There are three types:.

To create a custom query, use the query tab of the Expression editor to write a query script. You can use one of the default queries as an example. A custom query can be on multiple attributes. To use paged results with a custom query on a business object, you need to define a related query that counts the total number of results that the query would return without paging.

The count query name is based on the custom query name; for example, for a query named query1 , the count query must be named countForQuery1. For a default query, the count query is created automatically. When you call a query via the REST API, the relevant count query is automatically called in the background to get the total count, which can be used to calculate the number of pages necessary to retrieve all matching results.

To call a query, use the DAO instance. For a Groovy expression, there is a provided variable that implements the business object DAO class. Example: When handling business objects in a form, you want to reload business objects from a query and use a Groovy script to repopulate the form accordingly.

Suppose that a form shows a list of contracts that can be filtered according to the choice of client in a selection widget. When the user selects a client, this triggers the execution of a business object query, Contracts. A script parses the resulting list of Contracts and repopulates the contract list widget. This scenario requires DAO objects to be called from a Groovy script expression. The purpose of an index is to retrieve data more rapidly.

You can specify indexes on business objects to optimize performance of application. For example, for a process to modify purchase orders with an instantiation form used to search for the appropriate purchase order, define an index on purchase order number.

When you view a business object in the Bonita Studio business data model wizard, you can see the attributes that can be indexed. You can define an index on a single attribute or on an ordered list of attributes. An index is automatically created on the PersistenceID, as a primary key. This index is not visible in the BDM wizard. The BDM defines the indexes needed for all applications and processes that use business data. There is no limit to the number of indexes you can define.

However, if you define a large number of indexes and have a high volume of business data, it takes longer to build the indexes. In a production environment, indexes are built when a tenant starts or after a new BDM is deployed. Composition and aggregation are two ways in which you can define a composite business object that includes relationships with other business objects in the BDM.

In a composition relationship, a child object cannot exist independently of the parent. The composite business object contains attributes that are business objects. It can also contain attributes with simple data types. For example, a room object that is a child of a house object cannot exist if there is no house object. In an aggregation relationship, a child object can exist independently of the parent.

The composite business object refers to other business objects, as well as containing simple attributes. Example: A Purchase Order object consists of a set of primitive attribute variables such as PO number, client, creation date , and a set of order item objects.

The order items have no meaning outside the order, so have a composition relationship with the purchase order. An order item contains a product object and a simple attribute for quantity. The product object has an existence outside the order item it is used in the product catalog , so has an aggregation relationship with the order item. In Bonita, a composition relationship is unique: A given object can only be used in one composition relationship. For exemple, you cannot use the same object Wheel in composition for an object Car and an object Bike.

You will have to use an object WheelCar and an object WheelBike. In Bonita, in an aggregation relationship, a child must exist when creating its parent. When creating a parent, you must refer to an existing child to value an attribute with an aggregation relationship. In the Bonita Studio BDM wizard, you can specify the objects that are related by composition and aggregation, as well as the simple attributes.

A child object can be mandatory or optional. A child object can be multiple, which means that the composite object contains zero or more if optional or one or more if mandatory instances of the child object.

You cannot set a unique constraint on a child object. The default relationship is aggregation. When you configure an object in the Bonita Studio BDM wizard, the attribute dropdown list contains the names of the objects that can be included by composition or aggregation.

You cannot specify the object you are configuring or its parent. A composed object is automatically saved to the database using an appropriate schema. For a composition relationship, the child object contains the id of the parent object as a foreign key. For an aggregation relationship, if the child object is not multiple, the parent object contains the id of the child object as a foreign key. If the child object is multiple, the child object ids are stored in a dedicated association table.

When you create a process that uses a business object with a composition or aggregation relationship, treat the object as a typical business object, with the following exceptions:. To set the value of a composite object, either use a Groovy expression or directly assign the value to the child object from an existing class instance. You can use getter and setter methods in process or activity operations to set the composed objects as a single instance or as a java.

If your process uses a query from a Groovy expression or uses DAO objects from a client Java application, load the complete composite objects including the child objects. There are two options for loading complex business objects: lazy or eager. With lazy loading, the parent object instance is loaded. This is the option to choose when:. With eager loading, the parent object instance and the children objects instances are loaded at the same time.

Choosing the right option is not easy. The default option is lazy loading, but you may override this for any business object by configuring it to use eager loading when you specify the object relationship properties. If you are not sure about the final size of the parent object with children, we do strongly recommend to use the default lazy loading option.

Indeed, the eager loading option can have a huge impact on the platform performances, due to the additional data load and maintenance of the information in memory. The list can be a multiple business data variable, a multivalued process variable, or any type of list. You can use a list business object or variable to create multiple instances of a task. The MultiInstanceIterator reference created at task level uses each item of the list to create an instance of the task. It is automatically deployed to the built-in Bonita Engine and available to processes being run from Studio.

This means that you can have a different BDM in each Studio during development, which enables you to test the BDM before deploying it in your tenant. Tim Down Tim Down k 69 69 gold badges silver badges bronze badges. Sergey Maksimenko 7 7 silver badges 21 21 bronze badges. Tolgahan Albayrak Tolgahan Albayrak 1, 1 1 gold badge 11 11 silver badges 13 13 bronze badges. In case for those wondering This does not check for an empty string "" and undefined.

See my fiddle as reference: jsfiddle. Jonathon Bolster Jonathon Bolster This check is actually not safe. If myvar is 0, false or any other falsy value the test will fail if you only intend to check for not null.

So only use this to check for not null if the variable can never have another falsy value. I found a copy of what appears to be the post here: appendto. Looks like that site no longer exists. It would be helpful if you could include the information in the post itself, rather than just an external link.

This will not work if value present but is 0 zero — zmechanic. There is another possible scenario I have just come across. I did an ajax call and got data back as null, in a string format. I had to check it like this: if value! Flat Cat Flat Cat 4 4 gold badges 13 13 silver badges 22 22 bronze badges. Rather parse your value than comparing against null strings.

This answer is legitimate, whether or not you understand the application of it. I don't appreciate being downvoted for posting things that actually worked. Did you notice it had an upvote before you touched it? That's because it is a real scenario. Apparently you don't understand. I realize you think you do, but you don't.

I do understand that it was a working solution. Choose your interests Get the latest news, expert insights and market research, sent straight to your inbox.

Newsletter Topics Select minimum 1 topic. Big Data. When i tried… where is not null it is giving syntax error.

Pl advice which is correct way of. Sumit Walia Posted June 17, 0 Comments. Register or Login. Welcome back! Sign in with Email.