Add views

.test/activity.json

@@ -0,0 +1,56 @@
+{
+  "_group": "system_collections",
+  "_name": "activity",
+  "_version": "202507",
+  "singular": "activity",
+  "plural": "activities",
+  "idPrefix": "act",
+  "system": true,
+  "indexSpecs": [{
+    "name": "name_1",
+    "keys": { "name": 1 },
+    "unique": true
+  }],
+  "schema": {
+    "type": "object",
+    "properties": {
+      "_id": {
+        "bsonType": "string"
+      },
+      "person": {
+        "bsonType": "string"
+      },
+      "name": {
+        "bsonType": "string"
+      },
+      "createdAt": {
+        "bsonType": "date"
+      },
+      "updatedAt": {
+        "bsonType": "date"
+      },
+      "archivedAt": {
+        "bsonType": "date"
+      }
+    }
+  },
+  "views": {
+    "activityExpanded": {
+      "viewOn": "activity",
+      "pipeline": [{
+        "$lookup": {
+          "from": "person",
+          "localField": "person",
+          "foreignField": "_id",
+          "as": "refPerson"
+        }
+      }, {
+        "$unwind": "$refPerson"
+      }, {
+        "$set": { "person": "$refPerson" }
+      }, {
+        "$unset": "refPerson"
+      }]
+    }
+  }
+}

.test/person.json

@@ -0,0 +1,37 @@
+{
+  "_group": "system_collections",
+  "_name": "person",
+  "_version": "202507",
+  "singular": "person",
+  "plural": "persons",
+  "idPrefix": "prs",
+  "system": true,
+  "indexSpecs": [{
+    "name": "name_1",
+    "keys": { "name": 1 },
+    "unique": true
+  }],
+  "schema": {
+    "type": "object",
+    "properties": {
+      "_id": {
+        "bsonType": "string"
+      },
+      "name": {
+        "bsonType": "string"
+      },
+      "age": {
+        "bsonType": "number"
+      },
+      "createdAt": {
+        "bsonType": "date"
+      },
+      "updatedAt": {
+        "bsonType": "date"
+      },
+      "archivedAt": {
+        "bsonType": "date"
+      }
+    }
+  }
+}

.test/sample.json

@@ -0,0 +1,20 @@
+[{
+  "name": "PKCELL Ultra Alkaline Batteries Size D LR20-2B (2-Pack)",
+  "sku": "ALK-PK-LR202B-01",
+  "price": {
+    "value": 288,
+    "currency": "cad"
+  },
+  "active": true,
+  "tags": ["alkaline", "size-d", "pkcell"]
+}, {
+  "name": "Shimano Cleats SH-11 Yellow 6 degrees",
+  "sku": "BK-SM-SH51",
+  "active": true,
+  "tags": ["shimano", "cleats", "sh11", "cycling"]
+}, {
+  "name": "OSRAM Light Bulbs H7 Original Classic 12V 55W Spare Part Replacement",
+  "sku": "LT-OSR-H712V35W",
+  "active": false,
+  "tags": ["osram", "h7", "halogen-bulb", "12v", "55w"]
+}]

.test/user.json

@@ -0,0 +1,53 @@
+{
+  "_group": "system_collections",
+  "_name": "user",
+  "_version": "202507",
+  "singular": "user",
+  "plural": "users",
+  "idPrefix": "usr",
+  "system": true,
+  "indexSpecs": [{
+    "name": "username_1",
+    "keys": { "username": 1 },
+    "unique": true
+  }, {
+    "name": "email_1",
+    "keys": { "email": 1 },
+    "unique": true
+  }],
+  "schema": {
+    "type": "object",
+    "properties": {
+      "_id": {
+        "bsonType": "string"
+      },
+      "fullname": {
+        "bsonType": "string"
+      },
+      "firstname": {
+        "bsonType": "string"
+      },
+      "username": {
+        "bsonType": "string"
+      },
+      "password": {
+        "bsonType": "string"
+      },
+      "email": {
+        "bsonType": "string"
+      },
+      "credentials": {
+        "bsonType": ["object", "null"]
+      },
+      "createdAt": {
+        "bsonType": "date"
+      },
+      "updatedAt": {
+        "bsonType": "date"
+      },
+      "archivedAt": {
+        "bsonType": "date"
+      }
+    }
+  }
+}

main.go

@@ -41,10 +41,11 @@ type IMongoClient interface {
 type CollectionDefinition struct {
 	Name       string `bson:"_name"`
 	Singular   string `bson:"singular"`
-	Plural string `bson: "plural"`
-	IdPrefix string `bson: "idPrefix"`
-	IndexSpecs []map[string]any `bson: "indexSpecs"`
-	Schema map[string]any `bson: "schema"`
+	Plural     string `bson:"plural"`
+	IdPrefix   string `bson:"idPrefix"`
+	IndexSpecs []map[string]any `bson:"indexSpecs"`
+	Schema     map[string]any `bson:"schema"`
+	Views 	   map[string]any `bson:"views"`
 }
 
 // func (cd *CollectionDefinition) GetSchema(name string)
@@ -168,6 +169,8 @@ func (c *MongoClient) GetCollection(database, name string) *mongo.Collection {
 
 		c.CreateIndexes(collection, cdef)
 
+		c.CreateViews(db, cdef)
+
 		return collection
 	}
 }

main_index.go

@@ -21,7 +21,7 @@ func (c *MongoClient) CreateIndexes(collection *mongo.Collection, cdef *Collecti
   indexModels := make([]mongo.IndexModel, 0)
 
   for _, keyDef := range cdef.IndexSpecs {
-    log.Printf("Key Definition %s", keyDef["name"])
+    log.Printf("Key Definition [%s]%s", cdef.Name, keyDef["name"])
     
     kdb, err := bson.Marshal(keyDef)
     if err != nil {

main_views.go

@@ -0,0 +1,91 @@
+package mongo
+
+import (
+	"context"
+  "log"
+
+  // "runtime"
+
+  "go.mongodb.org/mongo-driver/v2/mongo"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+	"go.mongodb.org/mongo-driver/v2/bson"	
+)
+
+// CreateViews will create views for the given collection and definition.
+func (c *MongoClient) CreateViews(db *mongo.Database, cdef *CollectionDefinition) {
+  if cdef == nil || cdef.Views == nil {
+    log.Printf("No definitions will not create views")
+
+    return
+  }
+
+  // runtime.Breakpoint()
+
+  for name, defVal := range cdef.Views {
+
+  	// 1. Decode definition
+  	v, err := bson.Marshal(defVal)
+  	if err != nil {
+      log.Printf("failed to marshal %v", err)
+
+      continue
+    }
+
+    // 2. Take the raw representation
+    vRaw := bson.Raw(v)
+    if err := vRaw.Validate(); err != nil {
+      log.Printf("failed to validate bson raw: %v", err)
+
+      continue
+    }
+
+    pipelineVal := vRaw.Lookup("pipeline")
+    pipelineArr, ok := pipelineVal.ArrayOK()
+    if !ok {
+      log.Printf("Unable to extract pipeline")
+
+      continue
+    }
+    
+    pipeline := mongo.Pipeline{}
+
+    successPipeline := true
+    pipelineValues, _ := pipelineArr.Values()
+    for _, o := range pipelineValues {
+      var stage bson.D
+      if err := bson.Unmarshal(o.Value, &stage); err != nil {
+        log.Printf("failed to unmarshal stage %v, %v", o, err)
+
+        successPipeline = false
+        break
+      }
+
+      pipeline = append(pipeline, stage)
+    }
+
+    if successPipeline == false {
+      continue
+    }
+    
+		// Specify the Collation option to set a default collation for the view.
+		opts := options.CreateView().SetCollation(&options.Collation{
+			Locale: "en_US",
+		})
+
+		viewonVal := vRaw.Lookup("viewOn")
+    viewOn, ok := viewonVal.StringValueOK(); 
+    if !ok {
+    	log.Printf("failed to find viewOn")
+
+      continue
+    }
+
+		err = db.CreateView(context.TODO(), name, viewOn, pipeline, opts)
+		if err != nil {
+			log.Printf("failed to create view %v", err)
+
+      continue
+		}
+  }
+
+}

main_views_test.go

@@ -0,0 +1,61 @@
+package mongo
+
+import (
+	"os"
+	"context"
+	"strings"
+	"encoding/json"
+	"testing"
+
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+func TestCreateViews(t *testing.T) {
+	// 1. Register schemas
+	schemaPerson, err := os.ReadFile("./.test/person.json")
+	if err != nil { t.Fatal(err) }
+
+	schemaActivity, err := os.ReadFile("./.test/activity.json")
+	if err != nil { t.Fatal(err) }
+
+	var person bson.M
+	if err := json.Unmarshal(schemaPerson, &person); err != nil {
+		t.Fatalf("Length: %d, First bytes: %x\n", len(schemaPerson), schemaPerson[:4])
+	}
+
+	var activity bson.M
+	if err := json.Unmarshal(schemaActivity, &activity); err != nil {
+		t.Fatalf("Length: %d, First bytes: %x\n", len(schemaActivity), schemaActivity[:4])
+	}
+
+	client := GetMongoClient()
+	client.AddDefinition(person)
+	client.AddDefinition(activity)
+
+	// 2. Insert data
+	p1 := map[string]any {
+		"name": "MyName112",
+		"age": int32(25),
+	}
+
+	o, err := client.InsertOne(context.Background(), "mydb", "person", p1)
+	if err != nil { t.Fatalf("Failed to insertOne %#v", err) }
+
+	a1 := map[string]any {
+		"name": "Main activity",
+		"person": o["_id"],
+	}
+
+	o, err = client.InsertOne(context.Background(), "mydb", "activity", a1)
+	if err != nil { t.Fatalf("Failed to insertOne %#v", err) }
+
+	// 3. Should have activityExpanded defined, let's query it.
+	var results bson.M
+	filter := map[string]any { "person.name": "MyName112" }
+	c := client.Client.Database("mydb").Collection("activityExpanded")
+  c.FindOne(context.Background(), filter).Decode(&results)
+
+  if !strings.HasPrefix(results["_id"].(string), "act_") {
+		t.Fatal("_id should have been prefixed")
+	}
+}