diff --git a/src/main/java/fr/la_banquise/backend/data/model/Instance.java b/src/main/java/fr/la_banquise/backend/data/model/Instance.java
index 18fbb92..a229682 100644
--- a/src/main/java/fr/la_banquise/backend/data/model/Instance.java
+++ b/src/main/java/fr/la_banquise/backend/data/model/Instance.java
@@ -1,7 +1,5 @@
 package fr.la_banquise.backend.data.model;
 
-import java.util.Set;
-
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
@@ -29,25 +27,20 @@ public class Instance {
                        allocationSize = 1, initialValue = 1)
     public Long id;
 
-    @Column(unique = true, nullable = false)
-     public String name;
+    @Column(unique = true, nullable = false) public String name;
     // So people cant have more than one
     // container per JI because name will be login-jiId
 
     public int port;
 
-    //@JsonBackReference
     @JsonIgnore
     @ManyToOne
     @JoinColumn(name = "user_id", nullable = false)
     public User owner;
 
-    //@ManyToOne @JoinColumn(name = "ji_id", nullable = false) public Ji ji;
-
-    public Instance(String name, int port, User user ) {//, Ji ji) {
+    public Instance(String name, int port, User user) {
         this.name = name;
         this.port = port;
         this.owner = user;
-        //this.ji = ji;
     }
 }
diff --git a/src/main/java/fr/la_banquise/backend/data/model/Ji.java b/src/main/java/fr/la_banquise/backend/data/model/Ji.java
index 1b53cc7..49bffce 100644
--- a/src/main/java/fr/la_banquise/backend/data/model/Ji.java
+++ b/src/main/java/fr/la_banquise/backend/data/model/Ji.java
@@ -30,7 +30,12 @@ public class Ji {
     public Long id;
     public String name;
     public String description;
+    public String date;
 
+    @ManyToOne
+    @JoinColumn(name = "site_id") //@JsonIgnore
+    public Site site;
+    
     @JsonIgnore
     @ManyToMany
     @JoinTable(name = "ji_respos", // Table de liaison
@@ -45,12 +50,6 @@ public class Ji {
                inverseJoinColumns = @JoinColumn(name = "user_id"))
     public List<User> participants;
 
-    public String date;
-
-    @ManyToOne
-    @JoinColumn(name = "site_id") //@JsonIgnore
-    public Site site;
-
     @OneToMany @JoinColumn(name = "instance_id") public List<Instance> instances;
 
     public Ji(String name, String description, List<User> respos, String date,
@@ -61,5 +60,6 @@ public class Ji {
         this.date = date;
         this.site = site;
         this.participants = new ArrayList<User>();
+        this.instances = new ArrayList<Instance>();
     }
 }
diff --git a/src/main/java/fr/la_banquise/backend/data/model/Site.java b/src/main/java/fr/la_banquise/backend/data/model/Site.java
index 8dc60e9..becfcf0 100644
--- a/src/main/java/fr/la_banquise/backend/data/model/Site.java
+++ b/src/main/java/fr/la_banquise/backend/data/model/Site.java
@@ -1,7 +1,6 @@
 package fr.la_banquise.backend.data.model;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
-import jakarta.persistence.CascadeType;
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
@@ -34,15 +33,12 @@ public class Site {
     public String description;
     public String address;
 
-    /*@OneToMany(mappedBy = "ji", cascade = CascadeType.ALL)
-    public List<Instance> instances;*/
-
-    @OneToMany(mappedBy = "site") @JsonIgnore public List<Ji> jiInSite;
+    @OneToMany(mappedBy = "site") @JsonIgnore public List<Ji> listJi;
 
     public Site(String name, String description, String address) {
         this.name = name;
         this.description = description;
         this.address = address;
-        this.jiInSite = new ArrayList<Ji>();
+        this.listJi = new ArrayList<Ji>();
     }
 }
diff --git a/src/main/java/fr/la_banquise/backend/rest/JiResource.java b/src/main/java/fr/la_banquise/backend/rest/JiResource.java
index 6cf75b0..b005c83 100644
--- a/src/main/java/fr/la_banquise/backend/rest/JiResource.java
+++ b/src/main/java/fr/la_banquise/backend/rest/JiResource.java
@@ -43,9 +43,9 @@ public class JiResource {
     public Response createJi(@QueryParam("name") String name,
                              @QueryParam("date") String date,
                              @QueryParam("respo") String respo,
-                             @QueryParam("site") String name_site) {
+                             @QueryParam("site_id") Long siteId) {
         try {
-            Ji jsp = jiService.createJi(name, date, respo, name_site);
+            Ji jsp = jiService.createJi(name, date, respo, siteId);
             return Response.ok(Map.of("created", jsp)).build();
         } catch (Exception e) {
             return Response.status(500)
diff --git a/src/main/java/fr/la_banquise/backend/rest/SiteEndpoints.java b/src/main/java/fr/la_banquise/backend/rest/SiteEndpoints.java
index 2a11467..0590f61 100644
--- a/src/main/java/fr/la_banquise/backend/rest/SiteEndpoints.java
+++ b/src/main/java/fr/la_banquise/backend/rest/SiteEndpoints.java
@@ -71,7 +71,7 @@ public class SiteEndpoints {
     }
 
     @GET
-    @Path("/{name}")
+    @Path("/{ID}")
     @Produces(MediaType.APPLICATION_JSON)
     @Authenticated
     @Operation(summary = "Gets a site with its name", description = "")
@@ -83,9 +83,9 @@ public class SiteEndpoints {
     })
 
     public Response
-    getSiteByName(@PathParam("name") String name) {
+    getSite(@PathParam("ID") Long id) {
         try {
-            Site site = siteService.getSiteByName(name);
+            Site site = siteService.getSite(id);
             return Response.ok(site.toString()).build();
         } catch (Exception e) {
             return Response.status(500)
@@ -111,9 +111,9 @@ public class SiteEndpoints {
                              "Internal server error, usually site not found")
     })
     public Response
-    deleteSiteByName(@QueryParam("name") String name) {
+    deleteSite(@QueryParam("ID") Long id) {
         try {
-            boolean retour = siteService.deleteSiteByName(name);
+            boolean retour = siteService.deleteSite(id);
             if (retour) {
                 return Response.ok().build();
             }
diff --git a/src/main/java/fr/la_banquise/backend/services/JiService.java b/src/main/java/fr/la_banquise/backend/services/JiService.java
index aa97fec..b16a603 100644
--- a/src/main/java/fr/la_banquise/backend/services/JiService.java
+++ b/src/main/java/fr/la_banquise/backend/services/JiService.java
@@ -23,8 +23,8 @@ public class JiService {
 
     @Transactional
     public Ji createJi(String name, String description, String address,
-                       String site_name) {
-        Site site = siteService.getSiteByName(site_name);
+                       Long siteId) {
+        Site site = siteService.getSite(siteId);
         User currentUser =
             userRepository.findByName(security.getUserPrincipal().getName());
         Ji ji = new Ji(name, description, List.of(currentUser), "date", site);
diff --git a/src/main/java/fr/la_banquise/backend/services/SiteService.java b/src/main/java/fr/la_banquise/backend/services/SiteService.java
index 816d277..95c0eff 100644
--- a/src/main/java/fr/la_banquise/backend/services/SiteService.java
+++ b/src/main/java/fr/la_banquise/backend/services/SiteService.java
@@ -28,38 +28,24 @@ public class SiteService {
 
     public List<Site> getAllSites() { return siteRepository.listAll(); }
 
-    public Site getSiteByName(String name) {
-        return siteRepository.find("name", name).firstResult();
-    }
-
-    public Site getSiteById(Long id) { return siteRepository.findById(id); }
+    public Site getSite(Long id) { return siteRepository.findById(id); }
 
     @Transactional
     public void addJi(Site site, Ji ji) {
-        site.jiInSite.add(ji);
+        site.listJi.add(ji);
     }
 
     @Transactional
     public void removeJi(Site site, Ji ji) {
-        site.jiInSite.remove(ji);
+        site.listJi.remove(ji);
     }
 
     @Transactional
-    public boolean deleteSiteById(Long id) {
-        if (getSiteById(id).jiInSite.isEmpty()) {
+    public boolean deleteSite(Long id) {
+        if (getSite(id).listJi.isEmpty()) {
             siteRepository.deleteById(id);
             return true;
         }
         return false;
     }
-
-    @Transactional
-    public boolean deleteSiteByName(String name) {
-        Site site = getSiteByName(name);
-        if (site.jiInSite.isEmpty()) {
-            siteRepository.delete(site);
-            return true;
-        }
-        return false;
-    }
 }