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Editorial Team
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Asked: 2026-05-23T16:56:09+00:00

I have an error trying to build a model from an existing database in

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I have an error trying to build a model from an existing database in a symfony project using the Propel ORM.

The error is this:

build-propel.xml:474:20: The 1:1 relationship expressed by foreign key a_table_on_my_schema_FK_1 is defined in both directions; Propel does not currently support this (if you must have both foreign key constraints, consider adding this constraint with a custom SQL file.)

the schema.yml file is really extensive but the description of the table that causes the error (the first not correctly created) is like this:

self_referenced_table:
_attributes: { phpName: SelfReferencedTable }
[...]
JERARQUIC_CODE: { phpName: JerarquicCode, type: INTEGER, size: '8', required: false, foreignTable: self_referenced_table, foreignReference: JERARQUIC_CODE, onDelete: RESTRICT, onUpdate: RESTRICT }
[...]

I think this error is because of the self referenced table.

I need to implement a jerarquic relation between many elements so this implementation is a good way to do it. But causes me this problem on construction.

Can you give me some clues? have someone had this error? what would you do?

thank you!! 😀

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1 Answer

  1. Editorial Team

    Solved: It was not a self referencing table error, as said by @Colin Fine. The error was on the source database. I generated the schema.yml from an existing database on mysql. The error was there: the target attribute of the reference was not the identifier of the table, was the reference attribute itself. So, the generated schema.yml contained wrong definitions. I think i havn’t explained well enough:

    self_referenced_table was that:

    _attributes: { phpName: SelfReferencedTable }
    [...]
    JERARQUIC_CODE: { phpName: JerarquicCode, type: INTEGER, size: '8', required: false, foreignTable: self_referenced_table, foreignReference: JERARQUIC_CODE, onDelete: RESTRICT, onUpdate: RESTRICT }
    [...]

    self_referenced_table should be:

    _attributes: { phpName: SelfReferencedTable }
    [...]
    JERARQUIC_CODE: { phpName: JerarquicCode, type: INTEGER, size: '8', required: false, foreignTable: self_referenced_table, foreignReference: TABLE_CODE, onDelete: RESTRICT, onUpdate: RESTRICT }
    [...]

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