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0001-postgresql_backend-cache-ContentType-based-on-the-ma.patch

Benjamin Dauvergne, 12 avril 2019 17:16

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Subject: [PATCH] postgresql_backend: cache ContentType based on the manager
 object and model classes (#32248)

model classes and manager object are duplicated during migrations.

 tenant_schemas/postgresql_backend/base.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
tenant_schemas/postgresql_backend/base.py
185 185 
            # use weak for transient Manager
186 186 
            owner._thread_local_cache._cache = weakref.WeakKeyDictionary()
187 187 
        global_cache = owner._thread_local_cache._cache
188 
        get_cache = global_cache.get(owner)
188 
        model_cache = global_cache.setdefault(obj, weakref.WeakKeyDictionary())
189 
        get_cache = model_cache.get(obj.model)
189 190 
        if not get_cache:
190 191 
            # use an LRU cache to evict dead tenants with time and to prevent
191 192 
            # bloat with lot of tenants
192 193 
            @lru_cache(maxsize=200)
193 194 
            def get_cache(schema_name):
194 195 
                return {}
195 
            global_cache[owner] = get_cache
196 
            global_cache[obj.model] = get_cache
196 197 
        tenant = getattr(connection, 'tenant', None)
197 198 
        schema_name = getattr(tenant, 'schema_name', 'public')
198 199 
        return get_cache(schema_name)
199 
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