fix(association-field): initialize a [null] if no data
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				@ -26,6 +26,12 @@ const EditableAssociationField = observer((props: any) => {
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      return;
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					      return;
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    }
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					    }
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    if (field.value !== null && field.value !== undefined) {
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					    if (field.value !== null && field.value !== undefined) {
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					      // Nester 子表单时,如果没数据初始化一个 [null] 的占位
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					      if (currentMode === 'Nester' && Array.isArray(field.value)) {
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					        if (field.value.length === 0 && ['belongsToMany', 'hasMany'].includes(collectionField.type)) {
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					          field.value = [null];
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					        }
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					      }
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      setLoading(false);
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					      setLoading(false);
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      return;
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					      return;
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    }
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					    }
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