diff --git a/src/activitypub/actor.rs b/src/activitypub/actor.rs
index ccd54b8..f286d2e 100644
--- a/src/activitypub/actor.rs
+++ b/src/activitypub/actor.rs
@@ -184,7 +184,7 @@ pub fn get_local_actor(
         None => None,
     };
     let properties = user.profile.extra_fields.clone()
-        .unpack().into_iter()
+        .into_inner().into_iter()
         .map(|field| {
             ActorProperty {
                 object_type: PROPERTY_VALUE.to_string(),
diff --git a/src/database/int_enum.rs b/src/database/int_enum.rs
index c2e063e..5d4388a 100644
--- a/src/database/int_enum.rs
+++ b/src/database/int_enum.rs
@@ -19,7 +19,8 @@ macro_rules! int_enum_to_sql {
     ($t:ty) => {
         impl postgres_types::ToSql for $t {
             fn to_sql(
-                &self, _: &postgres_types::Type,
+                &self,
+                _: &postgres_types::Type,
                 out: &mut postgres_types::private::BytesMut,
             ) -> Result<postgres_types::IsNull, Box<dyn std::error::Error + Sync + Send>> {
                 let int_value: i16 = self.into();
diff --git a/src/database/json_macro.rs b/src/database/json_macro.rs
new file mode 100644
index 0000000..c784771
--- /dev/null
+++ b/src/database/json_macro.rs
@@ -0,0 +1,39 @@
+/// Implements FromSql trait for any de-serializable type
+macro_rules! json_from_sql {
+    ($t:ty) => {
+        impl<'a> postgres_types::FromSql<'a> for $t {
+            fn from_sql(
+                ty: &postgres_types::Type,
+                raw: &'a [u8],
+            ) -> Result<$t, Box<dyn std::error::Error + Sync + Send>> {
+                let postgres_types::Json(json_value) =
+                    postgres_types::Json::<serde_json::Value>::from_sql(ty, raw)?;
+                let value: $t = serde_json::from_value(json_value)?;
+                Ok(value)
+            }
+
+            postgres_types::accepts!(JSON, JSONB);
+        }
+    }
+}
+
+/// Implements ToSql trait for any serializable type
+macro_rules! json_to_sql {
+    ($t:ty) => {
+        impl postgres_types::ToSql for $t {
+            fn to_sql(
+                &self,
+                ty: &postgres_types::Type,
+                out: &mut postgres_types::private::BytesMut,
+            ) -> Result<postgres_types::IsNull, Box<dyn std::error::Error + Sync + Send>> {
+                let value = serde_json::to_value(self)?;
+                postgres_types::Json(value).to_sql(ty, out)
+            }
+
+            postgres_types::accepts!(JSON, JSONB);
+            postgres_types::to_sql_checked!();
+        }
+    }
+}
+
+pub(crate) use {json_from_sql, json_to_sql};
diff --git a/src/database/mod.rs b/src/database/mod.rs
index 0010d30..b9276fa 100644
--- a/src/database/mod.rs
+++ b/src/database/mod.rs
@@ -3,6 +3,7 @@ use tokio_postgres::error::{Error as PgError, SqlState};
 use crate::errors::DatabaseError;
 
 pub mod int_enum;
+pub mod json_macro;
 pub mod migrate;
 pub mod query_macro;
 
diff --git a/src/mastodon_api/accounts/types.rs b/src/mastodon_api/accounts/types.rs
index f07139e..b847691 100644
--- a/src/mastodon_api/accounts/types.rs
+++ b/src/mastodon_api/accounts/types.rs
@@ -59,7 +59,7 @@ impl Account {
             .map(|name| get_file_url(instance_url, name));
         let header_url = profile.banner_file_name.as_ref()
             .map(|name| get_file_url(instance_url, name));
-        let fields = profile.extra_fields.unpack().into_iter()
+        let fields = profile.extra_fields.into_inner().into_iter()
             .map(|field| AccountField { name: field.name, value: field.value })
             .collect();
         Self {
@@ -83,7 +83,7 @@ impl Account {
 
     pub fn from_user(user: User, instance_url: &str) -> Self {
         let fields_sources = user.profile.extra_fields.clone()
-            .unpack().into_iter()
+            .into_inner().into_iter()
             .map(|field| AccountField {
                 name: field.name,
                 value: field.value_source.unwrap_or(field.value),
diff --git a/src/models/profiles/types.rs b/src/models/profiles/types.rs
index 3e8a3f8..7728541 100644
--- a/src/models/profiles/types.rs
+++ b/src/models/profiles/types.rs
@@ -1,15 +1,12 @@
 use chrono::{DateTime, Utc};
-use postgres_types::{
-    FromSql, ToSql, IsNull, Type, Json,
-    accepts, to_sql_checked,
-    private::BytesMut,
-};
+use postgres_types::FromSql;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 use uuid::Uuid;
 
 use crate::activitypub::actor::Actor;
 use crate::activitypub::views::get_actor_url;
+use crate::database::json_macro::{json_from_sql, json_to_sql};
 use crate::errors::ValidationError;
 use super::validators::{
     validate_username,
@@ -29,7 +26,7 @@ pub struct ExtraField {
 pub struct ExtraFields(pub Vec<ExtraField>);
 
 impl ExtraFields {
-    pub fn unpack(self) -> Vec<ExtraField> {
+    pub fn into_inner(self) -> Vec<ExtraField> {
         let Self(extra_fields) = self;
         extra_fields
     }
@@ -39,35 +36,10 @@ pub fn get_currency_field_name(currency_code: &str) -> String {
     format!("${}", currency_code.to_uppercase())
 }
 
-type SqlError = Box<dyn std::error::Error + Sync + Send>;
+json_from_sql!(ExtraFields);
+json_to_sql!(ExtraFields);
 
-impl<'a> FromSql<'a> for ExtraFields {
-    fn from_sql(ty: &Type, raw: &'a [u8]) -> Result<Self, SqlError> {
-        let Json(json_value) = Json::<Value>::from_sql(ty, raw)?;
-        let fields: Self = serde_json::from_value(json_value)?;
-        Ok(fields)
-    }
-    accepts!(JSON, JSONB);
-}
-
-impl ToSql for ExtraFields {
-    fn to_sql(&self, ty: &Type, out: &mut BytesMut) -> Result<IsNull, SqlError> {
-        let value = serde_json::to_value(self)?;
-        Json(value).to_sql(ty, out)
-    }
-
-    accepts!(JSON, JSONB);
-    to_sql_checked!();
-}
-
-impl<'a> FromSql<'a> for Actor {
-    fn from_sql(ty: &Type, raw: &'a [u8]) -> Result<Self, SqlError> {
-        let Json(json_value) = Json::<Value>::from_sql(ty, raw)?;
-        let actor: Self = serde_json::from_value(json_value)?;
-        Ok(actor)
-    }
-    accepts!(JSON, JSONB);
-}
+json_from_sql!(Actor);
 
 #[derive(Clone, FromSql)]
 #[postgres(name = "actor_profile")]