more fixes

packages/plugins/swr/tests/test-model-meta.ts

@@ -43,7 +43,10 @@ export const modelMeta: ModelMeta = {
             ownerId: { ...fieldDefaults, type: 'User', name: 'owner', isForeignKey: true },
         },
     },
-    uniqueConstraints: {},
+    uniqueConstraints: {
+        user: { id: { name: 'id', fields: ['id'] } },
+        post: { id: { name: 'id', fields: ['id'] } },
+    },
     deleteCascade: {
         user: ['Post'],
     },

packages/plugins/tanstack-query/tests/test-model-meta.ts

@@ -43,7 +43,10 @@ export const modelMeta: ModelMeta = {
             ownerId: { ...fieldDefaults, type: 'User', name: 'owner', isForeignKey: true },
         },
     },
-    uniqueConstraints: {},
+    uniqueConstraints: {
+        user: { id: { name: 'id', fields: ['id'] } },
+        post: { id: { name: 'id', fields: ['id'] } },
+    },
     deleteCascade: {
         user: ['Post'],
     },

packages/runtime/src/cross/utils.ts

@@ -1,5 +1,5 @@
 import { lowerCaseFirst } from 'lower-case-first';
-import { ModelMeta } from '.';
+import { ModelMeta, requireField } from '.';
 
 /**
  * Gets field names in a data model entity, filtering out internal fields.
@@ -47,17 +47,15 @@ export function zip<T1, T2>(x: Enumerable<T1>, y: Enumerable<T2>): Array<[T1, T2
 }
 
 export function getIdFields(modelMeta: ModelMeta, model: string, throwIfNotFound = false) {
-    let fields = modelMeta.fields[lowerCaseFirst(model)];
-    if (!fields) {
+    const uniqueConstraints = modelMeta.uniqueConstraints[lowerCaseFirst(model)] ?? {};
+
+    const entries = Object.values(uniqueConstraints);
+    if (entries.length === 0) {
         if (throwIfNotFound) {
-            throw new Error(`Unable to load fields for ${model}`);
-        } else {
-            fields = {};
+            throw new Error(`Model ${model} does not have any id field`);
         }
+        return [];
     }
-    const result = Object.values(fields).filter((f) => f.isId);
-    if (result.length === 0 && throwIfNotFound) {
-        throw new Error(`model ${model} does not have an id field`);
-    }
-    return result;
+
+    return entries[0].fields.map((f) => requireField(modelMeta, model, f));
 }

packages/runtime/src/enhancements/policy/handler.ts

@@ -420,7 +420,7 @@ export class PolicyProxyHandler<DbClient extends DbClientContract> implements Pr
         });
 
         // return only the ids of the top-level entity
-        const ids = this.utils.getEntityIds(this.model, result);
+        const ids = this.utils.getEntityIds(model, result);
         return { result: ids, postWriteChecks: [...postCreateChecks.values()] };
     }
 
@@ -792,8 +792,10 @@ export class PolicyProxyHandler<DbClient extends DbClientContract> implements Pr
             }
 
             // proceed with the create and collect post-create checks
-            const { postWriteChecks: checks } = await this.doCreate(model, { data: createData }, db);
+            const { postWriteChecks: checks, result } = await this.doCreate(model, { data: createData }, db);
             postWriteChecks.push(...checks);
+
+            return result;
         };
 
         const _createMany = async (
@@ -881,18 +883,10 @@ export class PolicyProxyHandler<DbClient extends DbClientContract> implements Pr
                     // check pre-update guard
                     await this.utils.checkPolicyForUnique(model, uniqueFilter, 'update', db, args);
 
-                    // handles the case where id fields are updated
-                    const postUpdateIds = this.utils.clone(existing);
-                    for (const key of Object.keys(existing)) {
-                        const updateValue = (args as any).data ? (args as any).data[key] : (args as any)[key];
-                        if (
-                            typeof updateValue === 'string' ||
-                            typeof updateValue === 'number' ||
-                            typeof updateValue === 'bigint'
-                        ) {
-                            postUpdateIds[key] = updateValue;
-                        }
-                    }
+                    // handle the case where id fields are updated
+                    const _args: any = args;
+                    const updatePayload = _args.data && typeof _args.data === 'object' ? _args.data : _args;
+                    const postUpdateIds = this.calculatePostUpdateIds(model, existing, updatePayload);
 
                     // register post-update check
                     await _registerPostUpdateCheck(model, existing, postUpdateIds);
@@ -984,10 +978,13 @@ export class PolicyProxyHandler<DbClient extends DbClientContract> implements Pr
                     // update case
 
                     // check pre-update guard
-                    await this.utils.checkPolicyForUnique(model, uniqueFilter, 'update', db, args);
+                    await this.utils.checkPolicyForUnique(model, existing, 'update', db, args);
+
+                    // handle the case where id fields are updated
+                    const postUpdateIds = this.calculatePostUpdateIds(model, existing, args.update);
 
                     // register post-update check
-                    await _registerPostUpdateCheck(model, uniqueFilter, uniqueFilter);
+                    await _registerPostUpdateCheck(model, existing, postUpdateIds);
 
                     // convert upsert to update
                     const convertedUpdate = {
@@ -1021,9 +1018,22 @@ export class PolicyProxyHandler<DbClient extends DbClientContract> implements Pr
                 if (existing) {
                     // connect
                     await _connectDisconnect(model, args.where, context);
+                    return true;
                 } else {
                     // create
-                    await _create(model, args.create, context);
+                    const created = await _create(model, args.create, context);
+
+                    const upperContext = context.nestingPath[context.nestingPath.length - 2];
+                    if (upperContext?.where && context.field) {
+                        // check if the where clause of the upper context references the id
+                        // of the connected entity, if so, we need to update it
+                        this.overrideForeignKeyFields(upperContext.model, upperContext.where, context.field, created);
+                    }
+
+                    // remove the payload from the parent
+                    this.removeFromParent(context.parent, 'connectOrCreate', args);
+
+                    return false;
                 }
             },
 
@@ -1093,6 +1103,52 @@ export class PolicyProxyHandler<DbClient extends DbClientContract> implements Pr
         return { result, postWriteChecks };
     }
 
+    // calculate id fields used for post-update check given an update payload
+    private calculatePostUpdateIds(_model: string, currentIds: any, updatePayload: any) {
+        const result = this.utils.clone(currentIds);
+        for (const key of Object.keys(currentIds)) {
+            const updateValue = updatePayload[key];
+            if (typeof updateValue === 'string' || typeof updateValue === 'number' || typeof updateValue === 'bigint') {
+                result[key] = updateValue;
+            }
+        }
+        return result;
+    }
+
+    // updates foreign key fields inside `payload` based on relation id fields in `newIds`
+    private overrideForeignKeyFields(
+        model: string,
+        payload: any,
+        relation: FieldInfo,
+        newIds: Record<string, unknown>
+    ) {
+        if (!relation.foreignKeyMapping || Object.keys(relation.foreignKeyMapping).length === 0) {
+            return;
+        }
+
+        // override foreign key values
+        for (const [id, fk] of Object.entries(relation.foreignKeyMapping)) {
+            if (payload[fk] !== undefined && newIds[id] !== undefined) {
+                payload[fk] = newIds[id];
+            }
+        }
+
+        // deal with compound id fields
+        const uniqueConstraints = this.utils.getUniqueConstraints(model);
+        for (const [name, constraint] of Object.entries(uniqueConstraints)) {
+            if (constraint.fields.length > 1) {
+                const target = payload[name];
+                if (target) {
+                    for (const [id, fk] of Object.entries(relation.foreignKeyMapping)) {
+                        if (target[fk] !== undefined && newIds[id] !== undefined) {
+                            target[fk] = newIds[id];
+                        }
+                    }
+                }
+            }
+        }
+    }
+
     // Validates the given update payload against Zod schema if any
     private validateUpdateInputSchema(model: string, data: any) {
         const schema = this.utils.getZodSchema(model, 'update');
@@ -1228,7 +1284,14 @@ export class PolicyProxyHandler<DbClient extends DbClientContract> implements Pr
 
             if (existing) {
                 // update case
-                const { result, postWriteChecks } = await this.doUpdate({ where: existing, data: update, ...rest }, tx);
+                const { result, postWriteChecks } = await this.doUpdate(
+                    {
+                        where: this.utils.composeCompoundUniqueField(this.model, existing),
+                        data: update,
+                        ...rest,
+                    },
+                    tx
+                );
                 await this.runPostWriteChecks(postWriteChecks, tx);
                 return this.utils.readBack(tx, this.model, 'update', args, result);
             } else {

packages/runtime/src/enhancements/policy/policy-utils.ts

@@ -569,6 +569,27 @@ export class PolicyUtil {
         }
     }
 
+    composeCompoundUniqueField(model: string, fieldData: any) {
+        const uniqueConstraints = this.modelMeta.uniqueConstraints?.[lowerCaseFirst(model)];
+        if (!uniqueConstraints) {
+            return fieldData;
+        }
+
+        // e.g.:  { a: '1', b: '1' } => { a_b: { a: '1', b: '1' } }
+        const result: any = this.clone(fieldData);
+        for (const [name, constraint] of Object.entries(uniqueConstraints)) {
+            if (constraint.fields.length > 1 && constraint.fields.every((f) => fieldData[f] !== undefined)) {
+                // multi-field unique constraint, compose it
+                result[name] = constraint.fields.reduce<any>(
+                    (prev, field) => ({ ...prev, [field]: fieldData[field] }),
+                    {}
+                );
+                constraint.fields.forEach((f) => delete result[f]);
+            }
+        }
+        return result;
+    }
+
     /**
      * Gets unique constraints for the given model.
      */
@@ -642,6 +663,15 @@ export class PolicyUtil {
                         // preserve the original structure
                         currQuery[currField.backLink] = { ...visitWhere };
                     }
+
+                    if (forMutationPayload && currQuery[currField.backLink]) {
+                        // reconstruct compound unique field
+                        currQuery[currField.backLink] = this.composeCompoundUniqueField(
+                            backLinkField.type,
+                            currQuery[currField.backLink]
+                        );
+                    }
+
                     currQuery = currQuery[currField.backLink];
                 }
                 currField = field;

packages/sdk/src/model-meta-generator.ts

@@ -1,6 +1,7 @@
 import {
     ArrayExpr,
     DataModel,
+    DataModelAttribute,
     DataModelField,
     isArrayExpr,
     isBooleanLiteral,
@@ -239,10 +240,7 @@ function getFieldAttributes(field: DataModelField): RuntimeAttribute[] {
 function getUniqueConstraints(model: DataModel) {
     const constraints: Array<{ name: string; fields: string[] }> = [];
 
-    // model-level constraints
-    for (const attr of model.attributes.filter(
-        (attr) => attr.decl.ref?.name === '@@unique' || attr.decl.ref?.name === '@@id'
-    )) {
+    const extractConstraint = (attr: DataModelAttribute) => {
         const argsMap = getAttributeArgs(attr);
         if (argsMap.fields) {
             const fieldNames = (argsMap.fields as ArrayExpr).items.map(
@@ -253,14 +251,45 @@ function getUniqueConstraints(model: DataModel) {
                 // default constraint name is fields concatenated with underscores
                 constraintName = fieldNames.join('_');
             }
-            constraints.push({ name: constraintName, fields: fieldNames });
+            return { name: constraintName, fields: fieldNames };
+        } else {
+            return undefined;
+        }
+    };
+
+    const addConstraint = (constraint: { name: string; fields: string[] }) => {
+        if (!constraints.some((c) => c.name === constraint.name)) {
+            constraints.push(constraint);
+        }
+    };
+
+    // field-level @id first
+    for (const field of model.fields) {
+        if (hasAttribute(field, '@id')) {
+            addConstraint({ name: field.name, fields: [field.name] });
         }
     }
 
-    // field-level constraints
+    // then model-level @@id
+    for (const attr of model.attributes.filter((attr) => attr.decl.ref?.name === '@@id')) {
+        const constraint = extractConstraint(attr);
+        if (constraint) {
+            addConstraint(constraint);
+        }
+    }
+
+    // then field-level @unique
     for (const field of model.fields) {
-        if (hasAttribute(field, '@id') || hasAttribute(field, '@unique')) {
-            constraints.push({ name: field.name, fields: [field.name] });
+        if (hasAttribute(field, '@unique')) {
+            addConstraint({ name: field.name, fields: [field.name] });
+        }
+    }
+
+    // then model-level @@unique
+    for (const attr of model.attributes.filter((attr) => attr.decl.ref?.name === '@@unique')) {
+        const constraint = extractConstraint(attr);
+        if (constraint) {
+            addConstraint(constraint);
         }
     }