feat: Add meta property for cube definition (#7327) Thanks @mharrisb1 !

* feat: include meta property for cube schema

* feat: add support for null and number types in YAML transpilation

* chore: add test for cube meta

* chore(docs): add meta field to cube and view reference

* fix: only allow null values in meta children

* fix: unnamed dimension

* fix: remove support for nulls in meta

* chore: revert removal of support for nulls in meta

* chore: add back null type support within `meta`

* chore(docs): add back docs

---------

Co-authored-by: Pavel Tiunov <[email protected]>

Author: mharrisb1

docs/pages/reference/data-model/cube.mdx

@@ -158,6 +158,33 @@ cubes:
 
 </CodeTabs>
 
+### meta
+
+Custom metadata. Can be used to pass any information to the frontend.
+
+<CodeTabs>
+
+```javascript
+cube(`orders`, {
+  sql_table: `orders`,
+  title: `Product Orders`,
+  meta: {
+    any: `value`,
+  }
+});
+```
+
+```yaml
+cubes:
+  - name: orders
+    sql_table: orders
+    title: Product Orders
+    meta:
+      any: value
+```
+
+</CodeTabs>
+
 ### extends
 
 You can extend cubes in order to reuse all declared members of a cube. In the

docs/pages/reference/data-model/view.mdx

@@ -154,6 +154,29 @@ views:
 
 </CodeTabs>
 
+### meta
+
+Custom metadata. Can be used to pass any information to the frontend.
+
+<CodeTabs>
+
+```javascript
+view(`active_users`, {
+  meta: {
+    any: "value",
+  }
+});
+```
+
+```yaml
+views:
+  - name: active_users
+    meta:
+      any: value
+```
+
+</CodeTabs>
+
 ### `cubes`
 
 Use `cubes` parameter in view to include exposed cubes in bulk. You can build

packages/cubejs-schema-compiler/src/compiler/CubeToMetaTransformer.js

@@ -51,6 +51,7 @@ export class CubeToMetaTransformer {
         public: isCubeVisible,
         description: cube.description,
         connectedComponent: this.joinGraph.connectedComponents()[cube.name],
+        meta: cube.meta,
         measures: R.compose(
           R.map((nameToMetric) => ({
             ...this.measureConfig(cube.name, cubeTitle, nameToMetric),

packages/cubejs-schema-compiler/src/compiler/CubeValidator.ts

@@ -492,6 +492,7 @@ const baseSchema = {
   rewriteQueries: Joi.boolean().strict(),
   shown: Joi.boolean().strict(),
   public: Joi.boolean().strict(),
+  meta: Joi.any(),
   joins: Joi.object().pattern(identifierRegex, Joi.object().keys({
     sql: Joi.func().required(),
     relationship: Joi.any().valid(

packages/cubejs-schema-compiler/src/compiler/YamlCompiler.ts

@@ -169,6 +169,10 @@ export class YamlCompiler {
       return this.extractProgramBodyIfNeeded(ast);
     } else if (typeof obj === 'boolean') {
       return t.booleanLiteral(obj);
+    } else if (typeof obj === 'number') {
+      return t.numericLiteral(obj);
+    } else if (obj === null && propertyPath.includes('meta')) {
+      return t.nullLiteral();
     }
 
     if (typeof obj === 'object' && obj !== null) {

packages/cubejs-schema-compiler/test/unit/yaml-schema.test.ts

@@ -110,4 +110,36 @@ describe('Yaml Schema Testing', () => {
       expect(e.message).toContain('name isn\'t defined for dimension: ');
     }
   });
+
+  it('accepts cube meta', async () => {
+    const { compiler } = prepareYamlCompiler(
+      `
+      cubes:
+      - name: Users
+        sql: SELECT * FROM e2e.users
+        meta:
+          scalars:
+            example_string: "foo"
+            example_integer: 1
+            example_float: 1.0
+            example_boolean: true
+            example_null: null
+          sequence:
+            - 1
+            - 2
+            - 3
+          mixed_sequence:
+            - 1
+            - "foo"
+            - 3
+        dimensions:
+          - name: id
+            sql: id
+            type: number
+            primaryKey: true
+      `
+    );
+
+    await compiler.compile();
+  });
 });