diff --git a/.github/workflows/integration-tests.yml b/.github/workflows/integration-tests.yml
index ab5931d..165036f 100644
--- a/.github/workflows/integration-tests.yml
+++ b/.github/workflows/integration-tests.yml
@@ -11,21 +11,6 @@ jobs:
     name: Integration Tests
     runs-on: ubuntu-latest
 
-    services:
-      postgres:
-        image: postgres:16-alpine
-        env:
-          POSTGRES_USER: relspec
-          POSTGRES_PASSWORD: relspec_test_password
-          POSTGRES_DB: relspec_test
-        ports:
-          - 5432:5432
-        options: >-
-          --health-cmd pg_isready
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
-
     steps:
     - name: Checkout code
       uses: actions/checkout@v4
@@ -46,6 +31,29 @@ jobs:
     - name: Download dependencies
       run: go mod download
 
+    - name: Start PostgreSQL container
+      run: |
+        docker run -d \
+          --name relspec-test-postgres \
+          -e POSTGRES_USER=relspec \
+          -e POSTGRES_PASSWORD=relspec_test_password \
+          -e POSTGRES_DB=relspec_test \
+          -p 5432:5432 \
+          postgres:16-alpine
+
+    - name: Wait for PostgreSQL to be ready
+      run: |
+        echo "Waiting for PostgreSQL to start..."
+        for i in {1..30}; do
+          if docker exec relspec-test-postgres pg_isready -U relspec -d relspec_test > /dev/null 2>&1; then
+            echo "PostgreSQL is ready!"
+            break
+          fi
+          echo "Waiting... ($i/30)"
+          sleep 1
+        done
+        sleep 2
+
     - name: Install PostgreSQL client
       run: |
         sudo apt-get update
@@ -75,8 +83,14 @@ jobs:
         RELSPEC_TEST_PG_CONN: postgres://relspec:relspec_test_password@localhost:5432/relspec_test
       run: make test-integration
 
+    - name: Stop PostgreSQL container
+      if: always()
+      run: |
+        docker stop relspec-test-postgres || true
+        docker rm relspec-test-postgres || true
+
     - name: Summary
       if: always()
       run: |
         echo "Integration tests completed."
-        echo "PostgreSQL service was running on localhost:5432"
+        echo "PostgreSQL container has been cleaned up."
diff --git a/Makefile b/Makefile
index 7a609b5..a1ddaf9 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ test: test-unit ## Run all unit tests (alias for test-unit)
 
 test-unit: ## Run unit tests (excludes integration tests)
 	@echo "Running unit tests..."
-	$(GOTEST) -v -race -coverprofile=coverage.out -covermode=atomic $$(go list ./... | grep -v '/tests/integration' | grep -v '/pkg/readers/pgsql')
+	$(GOTEST) -v -race -coverprofile=coverage.out -covermode=atomic $$(go list ./... | grep -v '/tests/integration' | grep -v '/tests/assets' | grep -v '/pkg/readers/pgsql')
 
 test-integration: ## Run integration tests (requires RELSPEC_TEST_PG_CONN environment variable)
 	@echo "Running integration tests..."
diff --git a/pkg/readers/bun/reader.go b/pkg/readers/bun/reader.go
index 7b77bed..5cd5636 100644
--- a/pkg/readers/bun/reader.go
+++ b/pkg/readers/bun/reader.go
@@ -382,6 +382,23 @@ func (r *Reader) isRelationship(tag string) bool {
 	return strings.Contains(tag, "bun:\"rel:") || strings.Contains(tag, ",rel:")
 }
 
+// getRelationType extracts the relationship type from a bun tag
+func (r *Reader) getRelationType(bunTag string) string {
+	if strings.Contains(bunTag, "rel:has-many") {
+		return "has-many"
+	}
+	if strings.Contains(bunTag, "rel:belongs-to") {
+		return "belongs-to"
+	}
+	if strings.Contains(bunTag, "rel:has-one") {
+		return "has-one"
+	}
+	if strings.Contains(bunTag, "rel:many-to-many") {
+		return "many-to-many"
+	}
+	return ""
+}
+
 // parseRelationshipConstraints parses relationship fields to extract foreign key constraints
 func (r *Reader) parseRelationshipConstraints(table *models.Table, structType *ast.StructType, structMap map[string]*models.Table) {
 	for _, field := range structType.Fields.List {
@@ -409,27 +426,50 @@ func (r *Reader) parseRelationshipConstraints(table *models.Table, structType *a
 		}
 
 		// Parse the join information: join:user_id=id
-		// This means: referencedTable.user_id = thisTable.id
+		// This means: thisTable.user_id = referencedTable.id
 		joinInfo := r.parseJoinInfo(bunTag)
 		if joinInfo == nil {
 			continue
 		}
 
-		// The FK is on the referenced table
+		// Determine which table gets the FK based on relationship type
+		relType := r.getRelationType(bunTag)
+
+		var fkTable *models.Table
+		var fkColumn, refTable, refColumn string
+
+		if relType == "belongs-to" {
+			// For belongs-to: FK is on the current table
+			// join:user_id=id means table.user_id references referencedTable.id
+			fkTable = table
+			fkColumn = joinInfo.ForeignKey
+			refTable = referencedTable.Name
+			refColumn = joinInfo.ReferencedKey
+		} else if relType == "has-many" {
+			// For has-many: FK is on the referenced table
+			// join:id=user_id means referencedTable.user_id references table.id
+			fkTable = referencedTable
+			fkColumn = joinInfo.ReferencedKey
+			refTable = table.Name
+			refColumn = joinInfo.ForeignKey
+		} else {
+			continue
+		}
+
 		constraint := &models.Constraint{
-			Name:              fmt.Sprintf("fk_%s_%s", referencedTable.Name, table.Name),
+			Name:              fmt.Sprintf("fk_%s_%s", fkTable.Name, refTable),
 			Type:              models.ForeignKeyConstraint,
-			Table:             referencedTable.Name,
-			Schema:            referencedTable.Schema,
-			Columns:           []string{joinInfo.ForeignKey},
-			ReferencedTable:   table.Name,
-			ReferencedSchema:  table.Schema,
-			ReferencedColumns: []string{joinInfo.ReferencedKey},
+			Table:             fkTable.Name,
+			Schema:            fkTable.Schema,
+			Columns:           []string{fkColumn},
+			ReferencedTable:   refTable,
+			ReferencedSchema:  fkTable.Schema,
+			ReferencedColumns: []string{refColumn},
 			OnDelete:          "NO ACTION", // Bun doesn't specify this in tags
 			OnUpdate:          "NO ACTION",
 		}
 
-		referencedTable.Constraints[constraint.Name] = constraint
+		fkTable.Constraints[constraint.Name] = constraint
 	}
 }