diff --git a/application/controllers/api/v1/Admins.php b/application/controllers/api/v1/Admins.php
index c67c4aff..439af4bf 100644
--- a/application/controllers/api/v1/Admins.php
+++ b/application/controllers/api/v1/Admins.php
@@ -49,7 +49,7 @@ class Admins extends API_V1_Controller {
     {
         try
         {
-            $condition = $id !== NULL ? 'id = ' . $id : NULL;
+            $condition = $id !== NULL ? ['id' => $id] : NULL;
             $admins = $this->admins_model->get_batch($condition);
 
             if ($id !== NULL && count($admins) === 0)
@@ -94,7 +94,7 @@ class Admins extends API_V1_Controller {
             $id = $this->admins_model->add($admin);
 
             // Fetch the new object from the database and return it to the client.
-            $batch = $this->admins_model->get_batch('id = ' . $id);
+            $batch = $this->admins_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $status = new NonEmptyText('201 Created');
             $response->encode($this->parser)->singleEntry(TRUE)->output($status);
@@ -115,7 +115,7 @@ class Admins extends API_V1_Controller {
         try
         {
             // Update the admin record.
-            $batch = $this->admins_model->get_batch('id = ' . $id);
+            $batch = $this->admins_model->get_batch(['id' => $id]);
 
             if ($id !== NULL && count($batch) === 0)
             {
@@ -130,7 +130,7 @@ class Admins extends API_V1_Controller {
             $id = $this->admins_model->add($updatedAdmin);
 
             // Fetch the updated object from the database and return it to the client.
-            $batch = $this->admins_model->get_batch('id = ' . $id);
+            $batch = $this->admins_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $response->encode($this->parser)->singleEntry($id)->output();
         }
diff --git a/application/controllers/api/v1/Appointments.php b/application/controllers/api/v1/Appointments.php
index 09297b54..20d9118d 100644
--- a/application/controllers/api/v1/Appointments.php
+++ b/application/controllers/api/v1/Appointments.php
@@ -135,7 +135,7 @@ class Appointments extends API_V1_Controller {
             $this->notifications->notify_appointment_saved($appointment, $service, $provider, $customer, $settings, FALSE);
 
             // Fetch the new object from the database and return it to the client.
-            $batch = $this->appointments_model->get_batch('id = ' . $id);
+            $batch = $this->appointments_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $status = new NonEmptyText('201 Created');
             $response->encode($this->parser)->singleEntry(TRUE)->output($status);
@@ -156,7 +156,7 @@ class Appointments extends API_V1_Controller {
         try
         {
             // Update the appointment record.
-            $batch = $this->appointments_model->get_batch('id = ' . $id);
+            $batch = $this->appointments_model->get_batch(['id' => $id]);
 
             if ($id !== NULL && count($batch) === 0)
             {
@@ -186,7 +186,7 @@ class Appointments extends API_V1_Controller {
 
 
             // Fetch the updated object from the database and return it to the client.
-            $batch = $this->appointments_model->get_batch('id = ' . $id);
+            $batch = $this->appointments_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $response->encode($this->parser)->singleEntry($id)->output();
         }
diff --git a/application/controllers/api/v1/Categories.php b/application/controllers/api/v1/Categories.php
index 619a8851..20bbf6b9 100644
--- a/application/controllers/api/v1/Categories.php
+++ b/application/controllers/api/v1/Categories.php
@@ -49,7 +49,7 @@ class Categories extends API_V1_Controller {
     {
         try
         {
-            $condition = $id !== NULL ? 'id = ' . $id : NULL;
+            $condition = $id !== NULL ? ['id' => $id] : NULL;
             $categories = $this->services_model->get_all_categories($condition);
 
             if ($id !== NULL && count($categories) === 0)
@@ -94,7 +94,7 @@ class Categories extends API_V1_Controller {
             $id = $this->services_model->add_category($category);
 
             // Fetch the new object from the database and return it to the client.
-            $batch = $this->services_model->get_all_categories('id = ' . $id);
+            $batch = $this->services_model->get_all_categories(['id' => $id]);
             $response = new Response($batch);
             $status = new NonEmptyText('201 Created');
             $response->encode($this->parser)->singleEntry(TRUE)->output($status);
@@ -115,7 +115,7 @@ class Categories extends API_V1_Controller {
         try
         {
             // Update the category record.
-            $batch = $this->services_model->get_all_categories('id = ' . $id);
+            $batch = $this->services_model->get_all_categories(['id' => $id]);
 
             if ($id !== NULL && count($batch) === 0)
             {
@@ -130,7 +130,7 @@ class Categories extends API_V1_Controller {
             $id = $this->services_model->add_category($updated_category);
 
             // Fetch the updated object from the database and return it to the client.
-            $batch = $this->services_model->get_all_categories('id = ' . $id);
+            $batch = $this->services_model->get_all_categories(['id' => $id]);
             $response = new Response($batch);
             $response->encode($this->parser)->singleEntry($id)->output();
         }
diff --git a/application/controllers/api/v1/Customers.php b/application/controllers/api/v1/Customers.php
index 40d0464d..da7c774b 100644
--- a/application/controllers/api/v1/Customers.php
+++ b/application/controllers/api/v1/Customers.php
@@ -49,7 +49,7 @@ class Customers extends API_V1_Controller {
     {
         try
         {
-            $condition = $id !== NULL ? 'id = ' . $id : NULL;
+            $condition = $id !== NULL ? ['id' => $id] : NULL;
             $customers = $this->customers_model->get_batch($condition);
 
             if ($id !== NULL && count($customers) === 0)
@@ -94,7 +94,7 @@ class Customers extends API_V1_Controller {
             $id = $this->customers_model->add($customer);
 
             // Fetch the new object from the database and return it to the client.
-            $batch = $this->customers_model->get_batch('id = ' . $id);
+            $batch = $this->customers_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $status = new NonEmptyText('201 Created');
             $response->encode($this->parser)->singleEntry(TRUE)->output($status);
@@ -115,7 +115,7 @@ class Customers extends API_V1_Controller {
         try
         {
             // Update the customer record.
-            $batch = $this->customers_model->get_batch('id = ' . $id);
+            $batch = $this->customers_model->get_batch(['id' => $id]);
 
             if ($id !== NULL && count($batch) === 0)
             {
@@ -130,7 +130,7 @@ class Customers extends API_V1_Controller {
             $id = $this->customers_model->add($updated_customer);
 
             // Fetch the updated object from the database and return it to the client.
-            $batch = $this->customers_model->get_batch('id = ' . $id);
+            $batch = $this->customers_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $response->encode($this->parser)->singleEntry($id)->output();
         }
diff --git a/application/controllers/api/v1/Providers.php b/application/controllers/api/v1/Providers.php
index 68394e2a..b02fdeaa 100644
--- a/application/controllers/api/v1/Providers.php
+++ b/application/controllers/api/v1/Providers.php
@@ -49,7 +49,7 @@ class Providers extends API_V1_Controller {
     {
         try
         {
-            $condition = $id !== NULL ? 'id = ' . $id : NULL;
+            $condition = $id !== NULL ? ['id' => $id] : NULL;
             $providers = $this->providers_model->get_batch($condition);
 
             if ($id !== NULL && count($providers) === 0)
@@ -94,7 +94,7 @@ class Providers extends API_V1_Controller {
             $id = $this->providers_model->add($provider);
 
             // Fetch the new object from the database and return it to the client.
-            $batch = $this->providers_model->get_batch('id = ' . $id);
+            $batch = $this->providers_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $status = new NonEmptyText('201 Created');
             $response->encode($this->parser)->singleEntry(TRUE)->output($status);
@@ -115,7 +115,7 @@ class Providers extends API_V1_Controller {
         try
         {
             // Update the provider record.
-            $batch = $this->providers_model->get_batch('id = ' . $id);
+            $batch = $this->providers_model->get_batch(['id' => $id]);
 
             if ($id !== NULL && count($batch) === 0)
             {
@@ -130,7 +130,7 @@ class Providers extends API_V1_Controller {
             $id = $this->providers_model->add($updated_provider);
 
             // Fetch the updated object from the database and return it to the client.
-            $batch = $this->providers_model->get_batch('id = ' . $id);
+            $batch = $this->providers_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $response->encode($this->parser)->singleEntry($id)->output();
         }
diff --git a/application/controllers/api/v1/Secretaries.php b/application/controllers/api/v1/Secretaries.php
index 066abec1..b736f0ee 100644
--- a/application/controllers/api/v1/Secretaries.php
+++ b/application/controllers/api/v1/Secretaries.php
@@ -49,7 +49,7 @@ class Secretaries extends API_V1_Controller {
     {
         try
         {
-            $condition = $id !== NULL ? 'id = ' . $id : NULL;
+            $condition = $id !== NULL ? ['id' => $id] : NULL;
             $secretaries = $this->secretaries_model->get_batch($condition);
 
             if ($id !== NULL && count($secretaries) === 0)
@@ -94,7 +94,7 @@ class Secretaries extends API_V1_Controller {
             $id = $this->secretaries_model->add($secretary);
 
             // Fetch the new object from the database and return it to the client.
-            $batch = $this->secretaries_model->get_batch('id = ' . $id);
+            $batch = $this->secretaries_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $status = new NonEmptyText('201 Created');
             $response->encode($this->parser)->singleEntry(TRUE)->output($status);
@@ -115,7 +115,7 @@ class Secretaries extends API_V1_Controller {
         try
         {
             // Update the secretary record.
-            $batch = $this->secretaries_model->get_batch('id = ' . $id);
+            $batch = $this->secretaries_model->get_batch(['id' => $id]);
 
             if ($id !== NULL && count($batch) === 0)
             {
@@ -130,7 +130,7 @@ class Secretaries extends API_V1_Controller {
             $id = $this->secretaries_model->add($updated_secretary);
 
             // Fetch the updated object from the database and return it to the client.
-            $batch = $this->secretaries_model->get_batch('id = ' . $id);
+            $batch = $this->secretaries_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $response->encode($this->parser)->singleEntry($id)->output();
         }
diff --git a/application/controllers/api/v1/Services.php b/application/controllers/api/v1/Services.php
index e2083c22..3f4a3713 100644
--- a/application/controllers/api/v1/Services.php
+++ b/application/controllers/api/v1/Services.php
@@ -49,7 +49,7 @@ class Services extends API_V1_Controller {
     {
         try
         {
-            $condition = $id !== NULL ? 'id = ' . $id : NULL;
+            $condition = $id !== NULL ? ['id' => $id] : NULL;
             $services = $this->services_model->get_batch($condition);
 
             if ($id !== NULL && count($services) === 0)
@@ -94,7 +94,7 @@ class Services extends API_V1_Controller {
             $id = $this->services_model->add($service);
 
             // Fetch the new object from the database and return it to the client.
-            $batch = $this->services_model->get_batch('id = ' . $id);
+            $batch = $this->services_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $status = new NonEmptyText('201 Created');
             $response->encode($this->parser)->singleEntry(TRUE)->output($status);
@@ -115,7 +115,7 @@ class Services extends API_V1_Controller {
         try
         {
             // Update the service record.
-            $batch = $this->services_model->get_batch('id = ' . $id);
+            $batch = $this->services_model->get_batch(['id' => $id]);
 
             if ($id !== NULL && count($batch) === 0)
             {
@@ -130,7 +130,7 @@ class Services extends API_V1_Controller {
             $id = $this->services_model->add($updated_service);
 
             // Fetch the updated object from the database and return it to the client.
-            $batch = $this->services_model->get_batch('id = ' . $id);
+            $batch = $this->services_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $response->encode($this->parser)->singleEntry($id)->output();
         }
diff --git a/application/controllers/api/v1/Unavailabilities.php b/application/controllers/api/v1/Unavailabilities.php
index 7ae391c7..de4e8152 100644
--- a/application/controllers/api/v1/Unavailabilities.php
+++ b/application/controllers/api/v1/Unavailabilities.php
@@ -49,7 +49,7 @@ class Unavailabilities extends API_V1_Controller {
     {
         try
         {
-            $condition = $id !== NULL ? 'id = ' . $id : 'is_unavailable = 1';
+            $condition = $id !== NULL ? ['id' => $id] : 'is_unavailable = 1';
             $unavailabilities = $this->appointments_model->get_batch($condition);
 
             if ($id !== NULL && count($unavailabilities) === 0)
@@ -94,7 +94,7 @@ class Unavailabilities extends API_V1_Controller {
             $id = $this->appointments_model->add_unavailable($unavailability);
 
             // Fetch the new object from the database and return it to the client.
-            $batch = $this->appointments_model->get_batch('id = ' . $id);
+            $batch = $this->appointments_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $status = new NonEmptyText('201 Created');
             $response->encode($this->parser)->singleEntry(TRUE)->output($status);
@@ -115,7 +115,7 @@ class Unavailabilities extends API_V1_Controller {
         try
         {
             // Update the appointment record.
-            $batch = $this->appointments_model->get_batch('id = ' . $id);
+            $batch = $this->appointments_model->get_batch(['id' => $id]);
 
             if ($id !== NULL && count($batch) === 0)
             {
@@ -130,7 +130,7 @@ class Unavailabilities extends API_V1_Controller {
             $id = $this->appointments_model->add_unavailable($updatedUnavailability);
 
             // Fetch the updated object from the database and return it to the client.
-            $batch = $this->appointments_model->get_batch('id = ' . $id);
+            $batch = $this->appointments_model->get_batch(['id' => $id]);
             $response = new Response($batch);
             $response->encode($this->parser)->singleEntry($id)->output();
         }