Dynamics crm: relationships (2) - n:n many to many

Realization N:N, That is, there are two ways of many to many , One is OOB Out of the box way , One is to create an intermediate entity to map the entities on both sides ：

• Use the out of the box method provided by the system

First, we create two entities , One EntityA, One EntityB, then “New Many-to-Many Relationship” Create a and EntityB many-to-many ：

After the creation, we will EntityA and EntityB Medium ‘N:N Relationships’ You can see ：

  And then we look at these two entities Main form Make some changes ：

We are EnityA Lieutenant general EntityB Drag to the left navigation bar （ Click on the Navigation Button to make the left side editable ）

  In the same way, we are EnityB Lieutenant general EntityA Drag to the left navigation bar

  And then we were in EntityB Create several records in , such as test1,test2

  Then we point in EntityA A record in , for example 123 This record , Click on Related Medium EntityB

We will enter the associated view , Click on "Add Existing EntityB"

  In the pop-up sidebar on the right, we can select existing records and 123 This record is associated ,

You can also click "+ New Record" To jump to EntityB To create a new record , After creation, we can repeat the above steps to add existing records for association

  After Association ：

  Again , about EntityB, We can also do the same operation to correlate .

The above is to use the out of the box method to realize the many to many relationship .

• Create intermediate entities to realize many to many association

Now let's create an intermediate entity ‘EntityAEntityB’ To achieve a many to many relationship

  Then under this new entity, we call EntityA Create a N:1 Relationship,

  Similarly, under this new entity, we call EntityB Create a N:1 Relationship

  After the N:1 Relationship You can see the two relationships you created

  We are ‘EntityAEntityB’ Of Main Form Add the fields of the two relationships just created , save & publish

  In this way, we can create a many to many relationship through intermediate entities .

Let's use some data to test ：

EntityA Create some data in ：

 EntityB Create some data in ：

stay  EntityAEntityB Create an association in ：

  After creation ：