How to use SearchCriterio with fulltext of mysql

创建的fulltext索引：

class CourseText(Model):
    id = fields.IntField(pk=True)
    shines_text = fields.TextField()
    english_text = fields.TextField()

    def __str__(self):
        return self.shines_text

    class Meta:
        table = 'course_text'
        indexes = [
            FullTextIndex(fields=("shines_text", "english_text"), parser_name='ngram')
        ]

使用 SearchCriterio全文检索：

@app.get('/coursetext/{strs}')
async def get_course_text(strs: str):
    #c = await CourseText.raw(f"select * from course_text where match (shines_text, english_text) against ('{strs}')")

    c = SearchCriterion(Term('shines_text'),
                        Term('english_text'), expr=Term(strs), mode=Mode.NATURAL_LANGUAGE_MODE)

    return c

接口返回：

{
    "alias": null,
    "comparator": " ",
    "left": {
        "alias": null,
        "name": "MATCH",
        "args": [
            {
                "alias": "shines_text"
            },
            {
                "alias": "english_text"
            }
        ],
        "schema": null
    },
    "right": {
        "alias": null,
        "name": "AGAINST",
        "args": [
            {
                "alias": "王速所院里持口切"
            }
        ],
        "schema": null,
        "mode": "IN NATURAL LANGUAGE MODE"
    }
}

为什么没有正确返回检索出来的内容呢

Start with the CourseText model, its FullTextIndex declaration, and the get_course_text endpoint. Compare the commented raw SQL path with the SearchCriterion construction and inspect how the criterion is consumed by a query; done means the endpoint returns the expected full-text matches rather than only the criterion representation.