Naming Generated Functions in Propel

问题

The ideo of cross-reference tables is introduced in Propel 1.5. This means that an entity can get a list of related items as if it were a one-to-many relation. So in a person-to-groups relationship, a person can call getGroups(), and a group can call getPersons().

This makes things much easier to handle. However, if an entity has a many-to-many relationship to itself, the names of the function calls become more complex. As an example, the following permits groups to contain groups within themselves:

group:
  id: ~
  name: { type: varchar(255) }

sub_group:
  group_id:
    type: integer
    primaryKey: true
    foreignTable: group
    foreignReference: id
    required: true
  sub_group_id:
    type: integer
    primaryKey: true
    foreignTable: group
    foreignReference: id
    required: true

For this relationship, Propel generates the awkwardly named functions getGroupsRelatedByGroupId() and getGroupsRelatedBySubGroupId(). These are long and not immediately obvious. As a user of this entity, I would much prefer to use the functions getParentGroups() and getSubGroups(), which I can understand more clearly. Is it possible to tell Propel to rename these functions? The phpName attribute doesn't seem to do this.

The problem also occurs with one-to-many relations, as in the very simplified example below:

child:
  id: ~
  father_id:
    type: integer
    foreignTable: person
  mother_id:
    type: integer
    foreignTable: person

Above, a Child object will be given the functions getPersonRelatedByFatherId() and getPersonRelatedByMotherId(), when it should be immediately obvious that getMother() and getFather() would work better. It's possible to write custom functions that do this, but it would make much more sense to be able to define it in the schema.

回答1:

The solution is right here in the Propel docs but I've never noticed it until today: http://www.propelorm.org/documentation/04-relationships.html

Propel generates the setAuthor() method based on the phpName attribute of the element in the schema. When the attribute is not set, Propel uses the phpName of the related table instead.

Using your second example (in XML, but the conversion to YML should be simple):

<table name="person">
  <column name="id" type="integer" required="true" primaryKey="true" autoIncrement="true" />
  <column name="father_id" type="integer" />
  <column name="mother_id" type="integer" />
  <foreign-key foreigntable="person" onDelete="setnull" phpName="father">
    <reference local="father_id" foreign="id" />
  </foreign-key>
  <foreign-key foreigntable="person" onDelete="setnull" phpName="mother">
    <reference local="mother_id" foreign="id" />
  </foreign-key>
</table>

Notice the "phpName" attribute in the "foreign-key" element, that is where you set your custom relationship name. If you leave it blank (as I always did before today) it will use the "phpName" of the foreign relation table, or the table name itself if the phpName is not set on the table.

回答2:

AFAIK it's not possible but Propel 1.6.3 generates better methods and fully integrates N-N relations and a fluent API is provided (setter/getter for collections for instance).

William

来源：https://stackoverflow.com/questions/7091531/naming-generated-functions-in-propel

标签

symfony1

many-to-many

symfony-1.4

YAML

propel