Hey!
i hope this is the right place to ask this question! Here it goes: I want
to create a simple model with cariou that references itself to generate a
tree-structure. Like this:
(defn category []
(model/create :model {:name "category"
:fields [{:name "Label" :type "string"}
{:name "related-categories" :type "link"
:target-id (model/models :category :id)
:reciprocal-name
"relating-categories"}]}))
This results in a:
DEBUG :db insert into field values dependent = false, slug =
'relating-categories', position = 201, map = false, localized = false, name
= 'relating-categories', locked = false, model-id = '', target-id = 22,
uuid = '13776b59-7359-4412-850f-ffaa619665e0', type = 'link', updated-at =
'2014-02-04 09:53:48.578', model-position = 201, link-id = 380,
status-position = 139
Exception in thread "main" org.h2.jdbc.JdbcSQLException: NULL not allowed
for column "MODEL_ID"; SQL statement:
INSERT INTO field
(dependent,slug,position,map,localized,name,locked,model_id,target_id,uuid,type,updated_at,model_position,link_id,status_position)
VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?) [23502-170]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:329)
at org.h2.message.DbException.get(DbException.java:169)
at org.h2.message.DbException.get(DbException.java:146)
at org.h2.table.Column.validateConvertUpdateSequence(Column.java:293)...
Because the category to be reference is not yet available. Is there a way
to create a model and afterwards update it with constraints (Like you would
do in SQL)!?
Btw. naturally the other way around will dont work either:
(defn category []
(model/create :model {:name "category"
:fields [{:name "Label" :type "string"}
{:name "keywords" :type "string"}
{:name "parent-category" :type "part"
:target-id (model/models :category :id)
:reciprocal-name "child-categories"}]}))
And the bidirectional (or in caribou-speech: "reciprocal") also not:
(defn category []
(model/create :model {:name "category"
:fields [{:name "Label" :type "string"}
{:name "keywords" :type "string"}
{:name "parent-category" :type "link"
:target-id (model/models :category
:id)}]}))
Any hints? Btw. Caribou is really pragmatic, fast and clean, love it!
NoSQL/Riak support would awesome too!
Thanks and regards,
David
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